TY  - JOUR
AU  - Spasojević Brkić, Vesna
AU  - Mihajlović, Ivan
AU  - Misita, Mirjana
AU  - Perišić, Martina
AU  - Janev, Nemanja
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7821
AB  - Mining equipment working time is critical for ensuring output and fulfilling mining project deadlines. In order to find trends and possible downtime minimization measures, this article analyses numerous types of excavators, dump trucks, loaders, backhoe loaders, bucket wheel excavators, and surface-top hammer drill rigs in Serbian mining sites. The study collects data on mechanical, electrical, technological, organizational, abuse and meteorological downtimes types with the aim to highlight efficient ways for minimizing non-operational periods, hence improving the overall productivity and safety of mining operations in the industry. Special emphasis is put on excavators whose role in the mining industry is pivotal, directly impacting project timelines and financial outcomes. The methodology includes analysing the duration and implications of different downtime categories. Collected data showed non-parametric features, according to the descriptive statistics. To compare the data, the non-parametric Mann-Whitney U-test is implemented. The results of the research showed that, in most cases, there is a difference in the duration of downtimes between different categories of excavators` downtimes. However, a comparison between excavator downtimes and other machinery downtimes has not shown any statistically significant differences. This analysis aims to contribute to the optimisation of mining equipment usage, offering valuable insights for mining industry stakeholders.
PB  - University of Novi Sad, Technical faculty “Mihajlo Pupin” in Zrenjanin
T2  - JOURNAL OF ENGINEERING MANAGEMENT AND COMPETITIVENESS (JEMC)
T1  - EXCAVATOR DOWNTIME’S DIFFERENCES BETWEEN TYPES AND COMPARISON WITH OTHER MINING EQUIPMENT
EP  - 60
IS  - 1
SP  - 50
VL  - 14
DO  - 10.5937/JEMC2401050S
ER  - 

@article{
author = "Spasojević Brkić, Vesna and Mihajlović, Ivan and Misita, Mirjana and Perišić, Martina and Janev, Nemanja",
year = "2024",
abstract = "Mining equipment working time is critical for ensuring output and fulfilling mining project deadlines. In order to find trends and possible downtime minimization measures, this article analyses numerous types of excavators, dump trucks, loaders, backhoe loaders, bucket wheel excavators, and surface-top hammer drill rigs in Serbian mining sites. The study collects data on mechanical, electrical, technological, organizational, abuse and meteorological downtimes types with the aim to highlight efficient ways for minimizing non-operational periods, hence improving the overall productivity and safety of mining operations in the industry. Special emphasis is put on excavators whose role in the mining industry is pivotal, directly impacting project timelines and financial outcomes. The methodology includes analysing the duration and implications of different downtime categories. Collected data showed non-parametric features, according to the descriptive statistics. To compare the data, the non-parametric Mann-Whitney U-test is implemented. The results of the research showed that, in most cases, there is a difference in the duration of downtimes between different categories of excavators` downtimes. However, a comparison between excavator downtimes and other machinery downtimes has not shown any statistically significant differences. This analysis aims to contribute to the optimisation of mining equipment usage, offering valuable insights for mining industry stakeholders.",
publisher = "University of Novi Sad, Technical faculty “Mihajlo Pupin” in Zrenjanin",
journal = "JOURNAL OF ENGINEERING MANAGEMENT AND COMPETITIVENESS (JEMC)",
title = "EXCAVATOR DOWNTIME’S DIFFERENCES BETWEEN TYPES AND COMPARISON WITH OTHER MINING EQUIPMENT",
pages = "60-50",
number = "1",
volume = "14",
doi = "10.5937/JEMC2401050S"
}

Spasojević Brkić, V., Mihajlović, I., Misita, M., Perišić, M.,& Janev, N.. (2024). EXCAVATOR DOWNTIME’S DIFFERENCES BETWEEN TYPES AND COMPARISON WITH OTHER MINING EQUIPMENT. in JOURNAL OF ENGINEERING MANAGEMENT AND COMPETITIVENESS (JEMC)
University of Novi Sad, Technical faculty “Mihajlo Pupin” in Zrenjanin., 14(1), 50-60.
https://doi.org/10.5937/JEMC2401050S

Spasojević Brkić V, Mihajlović I, Misita M, Perišić M, Janev N. EXCAVATOR DOWNTIME’S DIFFERENCES BETWEEN TYPES AND COMPARISON WITH OTHER MINING EQUIPMENT. in JOURNAL OF ENGINEERING MANAGEMENT AND COMPETITIVENESS (JEMC). 2024;14(1):50-60.
doi:10.5937/JEMC2401050S .

Spasojević Brkić, Vesna, Mihajlović, Ivan, Misita, Mirjana, Perišić, Martina, Janev, Nemanja, "EXCAVATOR DOWNTIME’S DIFFERENCES BETWEEN TYPES AND COMPARISON WITH OTHER MINING EQUIPMENT" in JOURNAL OF ENGINEERING MANAGEMENT AND COMPETITIVENESS (JEMC), 14, no. 1 (2024):50-60,
https://doi.org/10.5937/JEMC2401050S . .

TY  - JOUR
AU  - Alsharif, Abdulghder Mohahmed
AU  - Spasojević Brkić, Vesna
AU  - Misita, Mirjana
AU  - Mihajlović, Ivan
AU  - Brkić, Aleksandar
AU  - Papić, Neda
AU  - Perišić, Martina
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7746
AB  - Transport and mining companies are vulnerable to a variety of hazards, and this paper offers a novel conceptual framework for organisational resilience assessment at different organisational levels. It is based on a safety climate and performances assessment in companies in the transport and mining sector. The framework contains factor and reliability analysis and continues by applying the SMART method from the perspective of resilience corners: anticipate, monitor, react and learn. The highest resilience coefficients at all organisational levels are obtained regarding safety awareness, safety training and safety communication areas, while the lowest values are observed for risk assessment and the organisational environment. The obtained results indicate that the ‘monitor’ resilience corner must be improved at all organisational levels, employees trained and procedures changed, since employees do not sufficiently use experience from previous events. The very high values at all organisational levels of the coefficients regarding the ‘anticipate’ and ‘learn’ resilience corners indicate organisational adaptation to changes through corrective activities, rather than planned preventive ones. All hierarchical levels have good resilience indicators, except for middle management, which expressed an adequate resilience index, due to the lower ratings of the safety training, organisational commitment, risk assessment and management support areas.
PB  - Taylor & Francis
T2  - Civil Engineering and Environmental Systems
T1  - The safety climate, hierarchical levels and resilience assessment in transport and mining companies
DO  - 10.1080/10286608.2024.2313753
ER  - 

@article{
author = "Alsharif, Abdulghder Mohahmed and Spasojević Brkić, Vesna and Misita, Mirjana and Mihajlović, Ivan and Brkić, Aleksandar and Papić, Neda and Perišić, Martina",
year = "2024",
abstract = "Transport and mining companies are vulnerable to a variety of hazards, and this paper offers a novel conceptual framework for organisational resilience assessment at different organisational levels. It is based on a safety climate and performances assessment in companies in the transport and mining sector. The framework contains factor and reliability analysis and continues by applying the SMART method from the perspective of resilience corners: anticipate, monitor, react and learn. The highest resilience coefficients at all organisational levels are obtained regarding safety awareness, safety training and safety communication areas, while the lowest values are observed for risk assessment and the organisational environment. The obtained results indicate that the ‘monitor’ resilience corner must be improved at all organisational levels, employees trained and procedures changed, since employees do not sufficiently use experience from previous events. The very high values at all organisational levels of the coefficients regarding the ‘anticipate’ and ‘learn’ resilience corners indicate organisational adaptation to changes through corrective activities, rather than planned preventive ones. All hierarchical levels have good resilience indicators, except for middle management, which expressed an adequate resilience index, due to the lower ratings of the safety training, organisational commitment, risk assessment and management support areas.",
publisher = "Taylor & Francis",
journal = "Civil Engineering and Environmental Systems",
title = "The safety climate, hierarchical levels and resilience assessment in transport and mining companies",
doi = "10.1080/10286608.2024.2313753"
}

Alsharif, A. M., Spasojević Brkić, V., Misita, M., Mihajlović, I., Brkić, A., Papić, N.,& Perišić, M.. (2024). The safety climate, hierarchical levels and resilience assessment in transport and mining companies. in Civil Engineering and Environmental Systems
Taylor & Francis..
https://doi.org/10.1080/10286608.2024.2313753

Alsharif AM, Spasojević Brkić V, Misita M, Mihajlović I, Brkić A, Papić N, Perišić M. The safety climate, hierarchical levels and resilience assessment in transport and mining companies. in Civil Engineering and Environmental Systems. 2024;.
doi:10.1080/10286608.2024.2313753 .

Alsharif, Abdulghder Mohahmed, Spasojević Brkić, Vesna, Misita, Mirjana, Mihajlović, Ivan, Brkić, Aleksandar, Papić, Neda, Perišić, Martina, "The safety climate, hierarchical levels and resilience assessment in transport and mining companies" in Civil Engineering and Environmental Systems (2024),
https://doi.org/10.1080/10286608.2024.2313753 . .

TY  - CONF
AU  - Bugarić, Uglješa
AU  - Spasojević Brkić, Vesna
AU  - Petrović, Nikola
AU  - Janev, Nemanja
AU  - Perišić, Martina
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7812
AB  - The mining industry has been steadily expanding annually to keep up with the increasing demands. Consequently, used machinery needs to work efficiently, which indicates that unexpected downtimes should be at the minimum possible level. Proper identification and risk evaluation of the potential breakdown is the most important element for efficient equipment maintenance and breakdown prevention. This research has focused on its reliability function determination and analyzed the consequences of downtime and the cost of repairs over a period of one year. Delays on the observed mining machine were classified according to the type of downtime: mechanical, technological, power/electricity, and downtime due to external influences. Input elements for risk assessment were severity of consequence (S), probability of occurrence (O), and failure detectability (D). The method used in this paper is based on the cost of maintenance and the impact of bulldozer breakdowns on reliability in order to maintain profitability and, by reducing the number of unwanted events caused by sudden failure of parts, increase safety during operation. Results show that the monitored bulldozer belongs to the lowest defined risk class, so its use is economically justifiable.
PB  - Technical Faculty in Bor
C3  - IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
T1  - A RISK EVALUATION OF BULLDOZER DOWNTIMES AND ITS ECONOMIC JUSTIFICATION IN OPEN-PIT MINES
EP  - 131
IS  - 1
SP  - 122
VL  - XX
DO  - 10.5937/IMCSM24012B
ER  - 

@conference{
author = "Bugarić, Uglješa and Spasojević Brkić, Vesna and Petrović, Nikola and Janev, Nemanja and Perišić, Martina",
year = "2024",
abstract = "The mining industry has been steadily expanding annually to keep up with the increasing demands. Consequently, used machinery needs to work efficiently, which indicates that unexpected downtimes should be at the minimum possible level. Proper identification and risk evaluation of the potential breakdown is the most important element for efficient equipment maintenance and breakdown prevention. This research has focused on its reliability function determination and analyzed the consequences of downtime and the cost of repairs over a period of one year. Delays on the observed mining machine were classified according to the type of downtime: mechanical, technological, power/electricity, and downtime due to external influences. Input elements for risk assessment were severity of consequence (S), probability of occurrence (O), and failure detectability (D). The method used in this paper is based on the cost of maintenance and the impact of bulldozer breakdowns on reliability in order to maintain profitability and, by reducing the number of unwanted events caused by sudden failure of parts, increase safety during operation. Results show that the monitored bulldozer belongs to the lowest defined risk class, so its use is economically justifiable.",
publisher = "Technical Faculty in Bor",
journal = "IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor",
title = "A RISK EVALUATION OF BULLDOZER DOWNTIMES AND ITS ECONOMIC JUSTIFICATION IN OPEN-PIT MINES",
pages = "131-122",
number = "1",
volume = "XX",
doi = "10.5937/IMCSM24012B"
}

Bugarić, U., Spasojević Brkić, V., Petrović, N., Janev, N.,& Perišić, M.. (2024). A RISK EVALUATION OF BULLDOZER DOWNTIMES AND ITS ECONOMIC JUSTIFICATION IN OPEN-PIT MINES. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
Technical Faculty in Bor., XX(1), 122-131.
https://doi.org/10.5937/IMCSM24012B

Bugarić U, Spasojević Brkić V, Petrović N, Janev N, Perišić M. A RISK EVALUATION OF BULLDOZER DOWNTIMES AND ITS ECONOMIC JUSTIFICATION IN OPEN-PIT MINES. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor. 2024;XX(1):122-131.
doi:10.5937/IMCSM24012B .

Bugarić, Uglješa, Spasojević Brkić, Vesna, Petrović, Nikola, Janev, Nemanja, Perišić, Martina, "A RISK EVALUATION OF BULLDOZER DOWNTIMES AND ITS ECONOMIC JUSTIFICATION IN OPEN-PIT MINES" in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor, XX, no. 1 (2024):122-131,
https://doi.org/10.5937/IMCSM24012B . .

TY  - CONF
AU  - Spasojević Brkić, Vesna
AU  - Janev, Nemanja
AU  - Petrović, Nikola
AU  - Bugarić, Uglješa
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7809
AB  - Numerous authors have demonstrated the effectiveness of the risk-based approach in the mining sector. However, the majority of earlier research has ignored the role that auxiliary machines, in total risk management play in favor of heavy machinery. This study aims to analyze backhoe loader maintenance data in order to offer a risk assessment approach for auxiliary machinery in open-pit mines. The severity, occurrence, and detection of failures were the three component indicators that together determined the overall risk, as per the FMEA method. The purpose of the Pareto chart was to grade the detection indicator by illustrating the failure type distribution and distinction. The downtime data statistical testing results enabled analytical calculation of the system's reliability and mean downtime, which in turn allowed for the evaluation of the frequency and severity of failures. As a result, a framework for evaluation was put out, supported by data that was gathered, and included a three-dimensional risk assessment matrix. The focus of further research efforts should be on expanding the present sample data in sense of quantity and also to analysis of other machines in the whole mining system.
PB  - Technical Faculty in Bor
C3  - IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
T1  - RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: A BACKHOE LOADER CASE STUDY
EP  - 78
IS  - 1
SP  - 69
VL  - XX
DO  - 10.5937/IMCSM24007S
ER  - 

@conference{
author = "Spasojević Brkić, Vesna and Janev, Nemanja and Petrović, Nikola and Bugarić, Uglješa",
year = "2024",
abstract = "Numerous authors have demonstrated the effectiveness of the risk-based approach in the mining sector. However, the majority of earlier research has ignored the role that auxiliary machines, in total risk management play in favor of heavy machinery. This study aims to analyze backhoe loader maintenance data in order to offer a risk assessment approach for auxiliary machinery in open-pit mines. The severity, occurrence, and detection of failures were the three component indicators that together determined the overall risk, as per the FMEA method. The purpose of the Pareto chart was to grade the detection indicator by illustrating the failure type distribution and distinction. The downtime data statistical testing results enabled analytical calculation of the system's reliability and mean downtime, which in turn allowed for the evaluation of the frequency and severity of failures. As a result, a framework for evaluation was put out, supported by data that was gathered, and included a three-dimensional risk assessment matrix. The focus of further research efforts should be on expanding the present sample data in sense of quantity and also to analysis of other machines in the whole mining system.",
publisher = "Technical Faculty in Bor",
journal = "IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor",
title = "RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: A BACKHOE LOADER CASE STUDY",
pages = "78-69",
number = "1",
volume = "XX",
doi = "10.5937/IMCSM24007S"
}

Spasojević Brkić, V., Janev, N., Petrović, N.,& Bugarić, U.. (2024). RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: A BACKHOE LOADER CASE STUDY. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
Technical Faculty in Bor., XX(1), 69-78.
https://doi.org/10.5937/IMCSM24007S

Spasojević Brkić V, Janev N, Petrović N, Bugarić U. RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: A BACKHOE LOADER CASE STUDY. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor. 2024;XX(1):69-78.
doi:10.5937/IMCSM24007S .

Spasojević Brkić, Vesna, Janev, Nemanja, Petrović, Nikola, Bugarić, Uglješa, "RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: A BACKHOE LOADER CASE STUDY" in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor, XX, no. 1 (2024):69-78,
https://doi.org/10.5937/IMCSM24007S . .

TY  - CONF
AU  - Spasojević Brkić, Vesna
AU  - Mihajlović, Ivan
AU  - Nikolić, Đorđe
AU  - Brkić, Aleksandar
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7808
AB  - Despite being the oldest, the mining industry continues to be a major source of pollution, with more people killed or injured than in all other industries. Additionally, social tension related to this sector is widespread around the world, since mining businesses continue to have a significant negative influence on land, water, air, biota, and people through direct and indirect mechanisms. The mining machinery workplaces, which are in the focus of this study have the largest environmental footprint. The dominance of technology-centered design in present research streams is most likely the explanation for the lack of advancement in the mining industry. The SmartMiner project creates shift from technology-centered design and its concept creates solutions for improving the standard of environmental quality in complex systems and suggests a paradigm change to a Human and Data-Centric Engineering. By aligning advanced operator I4.0&5.0 and society S5.0 standards, the SmartMiner project develops solutions for raising the level of environmental quality in complex interactions between physical, behavioural, and organizational processes field. Proposed paradigm can be easily transferred to other industries. The safety of mining machinery operators in their immediate surroundings and their regular alignment with value chain stakeholders are the first steps in our original idea approval process. Research moves to the operator macro-environment, which is determined by organizational contextual factors, and is encompassed by the development of intelligent, ergonomic, non-invasive, and dependable operator aid systems for regulating physical environment job stressors - noise, human vibration, lighting, temperature, air quality, workplace layout issues, etc., with high potential to solve environmental and human health issues and to influence overall performance.
PB  - Technical Faculty in Bor
C3  - IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
T1  - SMART, ERGONOMIC AND SUSTAINABLE MINING MACHINERY WORKPLACES: AN OVERVIEW OF THE SMARTMINER PROJECT
EP  - 59
IS  - 1
SP  - 49
VL  - XX
DO  - 10.5937/IMCSM24005S
ER  - 

@conference{
author = "Spasojević Brkić, Vesna and Mihajlović, Ivan and Nikolić, Đorđe and Brkić, Aleksandar",
year = "2024",
abstract = "Despite being the oldest, the mining industry continues to be a major source of pollution, with more people killed or injured than in all other industries. Additionally, social tension related to this sector is widespread around the world, since mining businesses continue to have a significant negative influence on land, water, air, biota, and people through direct and indirect mechanisms. The mining machinery workplaces, which are in the focus of this study have the largest environmental footprint. The dominance of technology-centered design in present research streams is most likely the explanation for the lack of advancement in the mining industry. The SmartMiner project creates shift from technology-centered design and its concept creates solutions for improving the standard of environmental quality in complex systems and suggests a paradigm change to a Human and Data-Centric Engineering. By aligning advanced operator I4.0&5.0 and society S5.0 standards, the SmartMiner project develops solutions for raising the level of environmental quality in complex interactions between physical, behavioural, and organizational processes field. Proposed paradigm can be easily transferred to other industries. The safety of mining machinery operators in their immediate surroundings and their regular alignment with value chain stakeholders are the first steps in our original idea approval process. Research moves to the operator macro-environment, which is determined by organizational contextual factors, and is encompassed by the development of intelligent, ergonomic, non-invasive, and dependable operator aid systems for regulating physical environment job stressors - noise, human vibration, lighting, temperature, air quality, workplace layout issues, etc., with high potential to solve environmental and human health issues and to influence overall performance.",
publisher = "Technical Faculty in Bor",
journal = "IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor",
title = "SMART, ERGONOMIC AND SUSTAINABLE MINING MACHINERY WORKPLACES: AN OVERVIEW OF THE SMARTMINER PROJECT",
pages = "59-49",
number = "1",
volume = "XX",
doi = "10.5937/IMCSM24005S"
}

Spasojević Brkić, V., Mihajlović, I., Nikolić, Đ.,& Brkić, A.. (2024). SMART, ERGONOMIC AND SUSTAINABLE MINING MACHINERY WORKPLACES: AN OVERVIEW OF THE SMARTMINER PROJECT. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
Technical Faculty in Bor., XX(1), 49-59.
https://doi.org/10.5937/IMCSM24005S

Spasojević Brkić V, Mihajlović I, Nikolić Đ, Brkić A. SMART, ERGONOMIC AND SUSTAINABLE MINING MACHINERY WORKPLACES: AN OVERVIEW OF THE SMARTMINER PROJECT. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor. 2024;XX(1):49-59.
doi:10.5937/IMCSM24005S .

Spasojević Brkić, Vesna, Mihajlović, Ivan, Nikolić, Đorđe, Brkić, Aleksandar, "SMART, ERGONOMIC AND SUSTAINABLE MINING MACHINERY WORKPLACES: AN OVERVIEW OF THE SMARTMINER PROJECT" in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor, XX, no. 1 (2024):49-59,
https://doi.org/10.5937/IMCSM24005S . .

TY  - CONF
AU  - Misita, Mirjana
AU  - Spasojević Brkić, Vesna
AU  - Mihajlović, Ivan
AU  - Brkić, Aleksandar
AU  - Perišić, Martina
AU  - Papić, Neda
AU  - Janev, Nemanja
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7810
AB  - The paper presents research into the possibility of applying machine learning algorithms in the prediction of stoppages and/or failure of excavator units. Regression trees, Random Forest and Support Vector Machine (SVM) algorithms were tested with different hyperparameter variations on the collected set of data on the causes and downtime of stoppages of the observed excavator units. The result indicates that the trained SVM algorithm with sufficient accuracy (MSE 0.106) can predict the stoppages of the observed excavator units. Further research is aimed at expanding the database and further improving the possibility of predicting the level of danger for various causes of stoppages and/or failure of the observed excavator units.
PB  - Technical Faculty in Bor
C3  - IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
T1  - SELECTION OF AN ALGORITHM FOR THE PREDICTION OF STOPPAGES AND/OR FAILURE OF EXCAVATION UNITS USING SUPERVISED MACHINE LEARNING
EP  - 91
IS  - 1
SP  - 79
VL  - XX
DO  - 10.5937/IMCSM24008M
ER  - 

@conference{
author = "Misita, Mirjana and Spasojević Brkić, Vesna and Mihajlović, Ivan and Brkić, Aleksandar and Perišić, Martina and Papić, Neda and Janev, Nemanja",
year = "2024",
abstract = "The paper presents research into the possibility of applying machine learning algorithms in the prediction of stoppages and/or failure of excavator units. Regression trees, Random Forest and Support Vector Machine (SVM) algorithms were tested with different hyperparameter variations on the collected set of data on the causes and downtime of stoppages of the observed excavator units. The result indicates that the trained SVM algorithm with sufficient accuracy (MSE 0.106) can predict the stoppages of the observed excavator units. Further research is aimed at expanding the database and further improving the possibility of predicting the level of danger for various causes of stoppages and/or failure of the observed excavator units.",
publisher = "Technical Faculty in Bor",
journal = "IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor",
title = "SELECTION OF AN ALGORITHM FOR THE PREDICTION OF STOPPAGES AND/OR FAILURE OF EXCAVATION UNITS USING SUPERVISED MACHINE LEARNING",
pages = "91-79",
number = "1",
volume = "XX",
doi = "10.5937/IMCSM24008M"
}

Misita, M., Spasojević Brkić, V., Mihajlović, I., Brkić, A., Perišić, M., Papić, N.,& Janev, N.. (2024). SELECTION OF AN ALGORITHM FOR THE PREDICTION OF STOPPAGES AND/OR FAILURE OF EXCAVATION UNITS USING SUPERVISED MACHINE LEARNING. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
Technical Faculty in Bor., XX(1), 79-91.
https://doi.org/10.5937/IMCSM24008M

Misita M, Spasojević Brkić V, Mihajlović I, Brkić A, Perišić M, Papić N, Janev N. SELECTION OF AN ALGORITHM FOR THE PREDICTION OF STOPPAGES AND/OR FAILURE OF EXCAVATION UNITS USING SUPERVISED MACHINE LEARNING. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor. 2024;XX(1):79-91.
doi:10.5937/IMCSM24008M .

Misita, Mirjana, Spasojević Brkić, Vesna, Mihajlović, Ivan, Brkić, Aleksandar, Perišić, Martina, Papić, Neda, Janev, Nemanja, "SELECTION OF AN ALGORITHM FOR THE PREDICTION OF STOPPAGES AND/OR FAILURE OF EXCAVATION UNITS USING SUPERVISED MACHINE LEARNING" in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor, XX, no. 1 (2024):79-91,
https://doi.org/10.5937/IMCSM24008M . .

TY  - CONF
AU  - Jama, Hetham Omer Mohamed
AU  - Spasojević Brkić, Vesna
AU  - Petrović, Nikola
AU  - Bugarić, Uglješa
AU  - Perišić, Martina
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7811
AB  - An appropriate maintenance strategy can maximize a machine’s capacity and economic lifetime and also produce yearly savings of several million euros. That being said, a risk assessment approach can help companies identify the systemic bottlenecks that are interfering with their development and cut a large portion of their profit each year. This paper presents a hybrid reliability-Failure Mode and Effects Analysis (FMEA) methodology to assess the risk associated with belt conveyor systems, particularly in open-pit mining environments. By integrating severity, occurrence, and detection indicators, a 3D risk assessment matrix was developed. Using data from conveyor system maintenance, including downtime and failure occurrences, chi-square tests to analyze system reliability and mean downtime were applied. The methodology allows for a nuanced understanding of the frequency and severity of failures, enabling more informed decision-making about maintenance strategies. The paper highlights the economic implications of system failures and the potential for substantial financial savings through optimized maintenance planning.
PB  - Technical Faculty in Bor
C3  - IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
T1  - A HYBRID RELIABILITY - FMEA METHODOLOGY IN RISK ASSESSMENT OF A BELT CONVEYOR SYSTEM
EP  - 121
SP  - 111
VL  - XX
VL  - 1
DO  - 10.5937/IMCSM24011J
ER  - 

@conference{
author = "Jama, Hetham Omer Mohamed and Spasojević Brkić, Vesna and Petrović, Nikola and Bugarić, Uglješa and Perišić, Martina",
year = "2024",
abstract = "An appropriate maintenance strategy can maximize a machine’s capacity and economic lifetime and also produce yearly savings of several million euros. That being said, a risk assessment approach can help companies identify the systemic bottlenecks that are interfering with their development and cut a large portion of their profit each year. This paper presents a hybrid reliability-Failure Mode and Effects Analysis (FMEA) methodology to assess the risk associated with belt conveyor systems, particularly in open-pit mining environments. By integrating severity, occurrence, and detection indicators, a 3D risk assessment matrix was developed. Using data from conveyor system maintenance, including downtime and failure occurrences, chi-square tests to analyze system reliability and mean downtime were applied. The methodology allows for a nuanced understanding of the frequency and severity of failures, enabling more informed decision-making about maintenance strategies. The paper highlights the economic implications of system failures and the potential for substantial financial savings through optimized maintenance planning.",
publisher = "Technical Faculty in Bor",
journal = "IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor",
title = "A HYBRID RELIABILITY - FMEA METHODOLOGY IN RISK ASSESSMENT OF A BELT CONVEYOR SYSTEM",
pages = "121-111",
volume = "XX, 1",
doi = "10.5937/IMCSM24011J"
}

Jama, H. O. M., Spasojević Brkić, V., Petrović, N., Bugarić, U.,& Perišić, M.. (2024). A HYBRID RELIABILITY - FMEA METHODOLOGY IN RISK ASSESSMENT OF A BELT CONVEYOR SYSTEM. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor
Technical Faculty in Bor., XX, 111-121.
https://doi.org/10.5937/IMCSM24011J

Jama HOM, Spasojević Brkić V, Petrović N, Bugarić U, Perišić M. A HYBRID RELIABILITY - FMEA METHODOLOGY IN RISK ASSESSMENT OF A BELT CONVEYOR SYSTEM. in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor. 2024;XX:111-121.
doi:10.5937/IMCSM24011J .

Jama, Hetham Omer Mohamed, Spasojević Brkić, Vesna, Petrović, Nikola, Bugarić, Uglješa, Perišić, Martina, "A HYBRID RELIABILITY - FMEA METHODOLOGY IN RISK ASSESSMENT OF A BELT CONVEYOR SYSTEM" in IMCSM Proceedings - International May Conference on Strategic Management – IMCSM24, May 31, 2024, Bor, XX (2024):111-121,
https://doi.org/10.5937/IMCSM24011J . .

TY  - CONF
AU  - Spasojević Brkić, Vesna
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7795
AB  - Although the mining industry is the oldest one, it is still a major source of pollution with more people hurt or injured than in any other industry, while social conflicts around it are worldwide spread. Namely, mining projects still have direct and indirect environmental impacts and seriously affect land, water, air, biota, and people, while mining equipment focused in this paper has the highest footprint. The reason for the lack of progress in mining industry is the most likely the fact that in current research streams technology-centered design dominates. Our novel Smart Miner concept aims to create a step toward smart, ergonomic and sustainable mining machinery workplaces. It proposes a paradigm shift from pure technology to a Human and Data-Centric Engineering, which could be easily transferred to other industries, and develops solutions for raising the level of environmental quality in complex interactions between phys- ical, behavioral and organizational processes field, by matching advanced operator I4.0&5.0 and society S5.0 standards.

An original idea approval route starts with mining machinery operator wellbeing in its microenvironment and its cyclical alignment with stakeholders in the value chain. After development of smart, ergonomic, non-invasive and reliable operator aid systems for regulation of physical environment job stressors - noise, human vibration, lighting, temperature, air quality, workplace layout issues etc., which solve environmental and human health issues and influence overall performance, research passes to operator macroenvironment determined by organizational contextual factors, which also impair sustainable development results. Micro and macro levels are planned to be connected and balanced by real time analytics to fit high sustainability performance indicators in novel, flexible and scalable system, aimed to increasing productivity and production together with reducing emissions and decrease of accidents rate.
PB  - Pages
C3  - 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany
T1  - A Step Towards Smart, Ergonomic and Sustainable Mining Machinery Workplaces
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7795
ER  - 

@conference{
author = "Spasojević Brkić, Vesna",
year = "2024",
abstract = "Although the mining industry is the oldest one, it is still a major source of pollution with more people hurt or injured than in any other industry, while social conflicts around it are worldwide spread. Namely, mining projects still have direct and indirect environmental impacts and seriously affect land, water, air, biota, and people, while mining equipment focused in this paper has the highest footprint. The reason for the lack of progress in mining industry is the most likely the fact that in current research streams technology-centered design dominates. Our novel Smart Miner concept aims to create a step toward smart, ergonomic and sustainable mining machinery workplaces. It proposes a paradigm shift from pure technology to a Human and Data-Centric Engineering, which could be easily transferred to other industries, and develops solutions for raising the level of environmental quality in complex interactions between phys- ical, behavioral and organizational processes field, by matching advanced operator I4.0&5.0 and society S5.0 standards.

An original idea approval route starts with mining machinery operator wellbeing in its microenvironment and its cyclical alignment with stakeholders in the value chain. After development of smart, ergonomic, non-invasive and reliable operator aid systems for regulation of physical environment job stressors - noise, human vibration, lighting, temperature, air quality, workplace layout issues etc., which solve environmental and human health issues and influence overall performance, research passes to operator macroenvironment determined by organizational contextual factors, which also impair sustainable development results. Micro and macro levels are planned to be connected and balanced by real time analytics to fit high sustainability performance indicators in novel, flexible and scalable system, aimed to increasing productivity and production together with reducing emissions and decrease of accidents rate.",
publisher = "Pages",
journal = "2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany",
title = "A Step Towards Smart, Ergonomic and Sustainable Mining Machinery Workplaces",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7795"
}

Spasojević Brkić, V.. (2024). A Step Towards Smart, Ergonomic and Sustainable Mining Machinery Workplaces. in 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany
Pages..
https://hdl.handle.net/21.15107/rcub_machinery_7795

Spasojević Brkić V. A Step Towards Smart, Ergonomic and Sustainable Mining Machinery Workplaces. in 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany. 2024;.
https://hdl.handle.net/21.15107/rcub_machinery_7795 .

Spasojević Brkić, Vesna, "A Step Towards Smart, Ergonomic and Sustainable Mining Machinery Workplaces" in 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany (2024),
https://hdl.handle.net/21.15107/rcub_machinery_7795 .

Brkić, A., Spasojević Brkić, V., Mihajlović, I., Misita, M., Đurić, G., Bugarić, U.,& Stević, Ž.. (2024). Контекстуални адаптивни систем за митигацију ризика рада рударских машина. in Odluka Matičnog odbora od 29.03.2024. o kategorizaciji M81- Novo tehničko rešenje primenjeno na međunarodnom nivou.
https://hdl.handle.net/21.15107/rcub_machinery_7796

Brkić A, Spasojević Brkić V, Mihajlović I, Misita M, Đurić G, Bugarić U, Stević Ž. Контекстуални адаптивни систем за митигацију ризика рада рударских машина. in Odluka Matičnog odbora od 29.03.2024. o kategorizaciji M81- Novo tehničko rešenje primenjeno na međunarodnom nivou. 2024;.
https://hdl.handle.net/21.15107/rcub_machinery_7796 .

Brkić, Aleksandar, Spasojević Brkić, Vesna, Mihajlović, Ivan, Misita, Mirjana, Đurić, Goran, Bugarić, Uglješa, Stević, Željko, "Контекстуални адаптивни систем за митигацију ризика рада рударских машина" in Odluka Matičnog odbora od 29.03.2024. o kategorizaciji M81- Novo tehničko rešenje primenjeno na međunarodnom nivou (2024),
https://hdl.handle.net/21.15107/rcub_machinery_7796 .

TY  - CONF
AU  - Dimić Mišić, Katarina
AU  - Brkić, Aleksandar
AU  - Spasojević Brkić, Vesna
AU  - Barcelo Rodrigez, Ernest
AU  - Imani, Monir
AU  - Gane, Patrick
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7794
AB  - Quality of air in the cabin of transportation vehicle is of high importance due to increase in globalization that hinders rise of transportation of goods worldwide. The largest source of streets pollution in urban areas is vehicular combustion, constituted mainly of gaseous pollutants such as CO2, CO, oxides of nitrogen (NOx), ozone, and particles such as ultra-fine particulate matter (UFP). Drivers of heavy-duty vehicles (HDV) are spending both their working and free time in vehicle cabins, making then highly exposed to toxic gases and hazardous aerosols. Intensive industrial development is more concentrated in metropolitan areas, and since it still relies on fossil fuels energy, it results in high pollution of air with traf- fic-related air pollutants (TRAPs). Primary sources of UFPs in the urban environment near road sites are caused by HDV, and they enter cabin air through windows, accumulating in the cabin air and on the surfaces, resulting of up to three times higher concentration of TRAPs in cabin than outdoor air. Exposures to high CO2, NOx and UFP can significantly reduce decision-making performance and is main cause of premature deaths of HDV drivers. Sedimentation of UFP onto filter surfaces, long filter exposure times, and high temperatures within cabins cause decrease of air-flow within the filter and drastic decrease of filtering efficiency. By combining experimental results obtained from in-filed measurements performed in the city of Belgrade, during peak traffic hours, for filtration systems (AFS) placed at different positions within the cabins, obtained master present role of air filtration systems. Using analytical approach of experimental results, we propose mathematical model that describes AFS efficiency on cabin pollution mitigation. Predicted results are in close agreement with the experimental data showing that outdoor to cabin pollutants concentration is possible to estimate as it depends on and terrain design, filtration time and thermodynamic parameters within cabin. We hope that this research rises organizational attention to the health and welfare of HDV drivers.
PB  - Pages
C3  - 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany
T1  - Filtering Efficiency of Pollutants in Heavy-Duty Vehicle Cabins
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7794
ER  - 

@conference{
author = "Dimić Mišić, Katarina and Brkić, Aleksandar and Spasojević Brkić, Vesna and Barcelo Rodrigez, Ernest and Imani, Monir and Gane, Patrick",
year = "2024",
abstract = "Quality of air in the cabin of transportation vehicle is of high importance due to increase in globalization that hinders rise of transportation of goods worldwide. The largest source of streets pollution in urban areas is vehicular combustion, constituted mainly of gaseous pollutants such as CO2, CO, oxides of nitrogen (NOx), ozone, and particles such as ultra-fine particulate matter (UFP). Drivers of heavy-duty vehicles (HDV) are spending both their working and free time in vehicle cabins, making then highly exposed to toxic gases and hazardous aerosols. Intensive industrial development is more concentrated in metropolitan areas, and since it still relies on fossil fuels energy, it results in high pollution of air with traf- fic-related air pollutants (TRAPs). Primary sources of UFPs in the urban environment near road sites are caused by HDV, and they enter cabin air through windows, accumulating in the cabin air and on the surfaces, resulting of up to three times higher concentration of TRAPs in cabin than outdoor air. Exposures to high CO2, NOx and UFP can significantly reduce decision-making performance and is main cause of premature deaths of HDV drivers. Sedimentation of UFP onto filter surfaces, long filter exposure times, and high temperatures within cabins cause decrease of air-flow within the filter and drastic decrease of filtering efficiency. By combining experimental results obtained from in-filed measurements performed in the city of Belgrade, during peak traffic hours, for filtration systems (AFS) placed at different positions within the cabins, obtained master present role of air filtration systems. Using analytical approach of experimental results, we propose mathematical model that describes AFS efficiency on cabin pollution mitigation. Predicted results are in close agreement with the experimental data showing that outdoor to cabin pollutants concentration is possible to estimate as it depends on and terrain design, filtration time and thermodynamic parameters within cabin. We hope that this research rises organizational attention to the health and welfare of HDV drivers.",
publisher = "Pages",
journal = "2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany",
title = "Filtering Efficiency of Pollutants in Heavy-Duty Vehicle Cabins",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7794"
}

Dimić Mišić, K., Brkić, A., Spasojević Brkić, V., Barcelo Rodrigez, E., Imani, M.,& Gane, P.. (2024). Filtering Efficiency of Pollutants in Heavy-Duty Vehicle Cabins. in 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany
Pages..
https://hdl.handle.net/21.15107/rcub_machinery_7794

Dimić Mišić K, Brkić A, Spasojević Brkić V, Barcelo Rodrigez E, Imani M, Gane P. Filtering Efficiency of Pollutants in Heavy-Duty Vehicle Cabins. in 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany. 2024;.
https://hdl.handle.net/21.15107/rcub_machinery_7794 .

Dimić Mišić, Katarina, Brkić, Aleksandar, Spasojević Brkić, Vesna, Barcelo Rodrigez, Ernest, Imani, Monir, Gane, Patrick, "Filtering Efficiency of Pollutants in Heavy-Duty Vehicle Cabins" in 2nd International Conference on Renewable and Non-Renewable Energy & International Conference on Mechanical and Mechatronics Engineering April 22-23, 2024 | Munich, Germany (2024),
https://hdl.handle.net/21.15107/rcub_machinery_7794 .

TY  - JOUR
AU  - Spasojević Brkić, Vesna
AU  - Tomić, Branislav
AU  - Perišić, Martina
AU  - Janev, Nemanja
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7172
AB  - Previous research shows that Kaizen's benefits are multiple and evident,
but its practices in the supply chain have been sufficiently examined now.
Conversely, we are witnessing numerous issues in contemporary global
supply networks. In this survey, after conducting a literature review, three
research questions regarding Kaizen modes of usage were formulated and
tested on the sample of 195 enterprises that are part of the global supply
chain, located in 31 countries, and active in two different types of
industries – aircraft, and transportation. A combined approach containing
descriptive statistics, reliability, factor analysis, and statistical hypothesis
testing by Kruskal-Wallis one-way ANOVA and Mann-Whitney U tests
were used. Results show significant differences between Kaizen practices
applied in countries such as Italy, the United Kingdom, Canada, the USA,
Japan, and China, where national and corporate cultures differ. Kaizen
implementation significantly differs between companies operating in the
aircraft and transportation sectors, which is unsurprising since aircraft
industry has a higher formalization level. The goal to determine the
differences in Kaizen practices around the globe was fulfilled since
statistically significant differences indicate the importance of the
contextual factors and connect adverse and Kaizen events.
PB  - Faculty of Mechanical Engineering, Belgrade
T2  - FME Transactions
T1  - Differences in Kaizen Implementation between Countries and Industry Types in Multinational Supply Chain
EP  - 191
IS  - 2
SP  - 183
VL  - 51
DO  - 10.5937/fme2302183S
ER  - 

@article{
author = "Spasojević Brkić, Vesna and Tomić, Branislav and Perišić, Martina and Janev, Nemanja",
year = "2023",
abstract = "Previous research shows that Kaizen's benefits are multiple and evident,
but its practices in the supply chain have been sufficiently examined now.
Conversely, we are witnessing numerous issues in contemporary global
supply networks. In this survey, after conducting a literature review, three
research questions regarding Kaizen modes of usage were formulated and
tested on the sample of 195 enterprises that are part of the global supply
chain, located in 31 countries, and active in two different types of
industries – aircraft, and transportation. A combined approach containing
descriptive statistics, reliability, factor analysis, and statistical hypothesis
testing by Kruskal-Wallis one-way ANOVA and Mann-Whitney U tests
were used. Results show significant differences between Kaizen practices
applied in countries such as Italy, the United Kingdom, Canada, the USA,
Japan, and China, where national and corporate cultures differ. Kaizen
implementation significantly differs between companies operating in the
aircraft and transportation sectors, which is unsurprising since aircraft
industry has a higher formalization level. The goal to determine the
differences in Kaizen practices around the globe was fulfilled since
statistically significant differences indicate the importance of the
contextual factors and connect adverse and Kaizen events.",
publisher = "Faculty of Mechanical Engineering, Belgrade",
journal = "FME Transactions",
title = "Differences in Kaizen Implementation between Countries and Industry Types in Multinational Supply Chain",
pages = "191-183",
number = "2",
volume = "51",
doi = "10.5937/fme2302183S"
}

Spasojević Brkić, V., Tomić, B., Perišić, M.,& Janev, N.. (2023). Differences in Kaizen Implementation between Countries and Industry Types in Multinational Supply Chain. in FME Transactions
Faculty of Mechanical Engineering, Belgrade., 51(2), 183-191.
https://doi.org/10.5937/fme2302183S

Spasojević Brkić V, Tomić B, Perišić M, Janev N. Differences in Kaizen Implementation between Countries and Industry Types in Multinational Supply Chain. in FME Transactions. 2023;51(2):183-191.
doi:10.5937/fme2302183S .

Spasojević Brkić, Vesna, Tomić, Branislav, Perišić, Martina, Janev, Nemanja, "Differences in Kaizen Implementation between Countries and Industry Types in Multinational Supply Chain" in FME Transactions, 51, no. 2 (2023):183-191,
https://doi.org/10.5937/fme2302183S . .

TY  - CONF
AU  - Brkić, Aleksandar
AU  - Spasojević Brkić, Vesna
AU  - Misita, Mirjana
AU  - Papić, Neda
AU  - Perišić, Martina
AU  - Janev, Nemanja
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6951
AB  - Two-level risk mapping and assessment methodology was proposed with several criteria for risk prioritization (frequency of occurrence, downtime, level of danger, type of stoppage, cause of downtime, risk number). In a period of one year all stoppages, both planned and unplanned, were monitored and later on classified by type into: technological, mechanical, electrical, stoppages caused by the machine operator, external stoppages, which include stoppages of machine inactivity due to weather conditions and the like. The methodology proposed is oriented towards the calculation of risks to people, property, etc., which arise from various types of downtime. Then, based on the recording of data on stoppages of the observed machine, the structure of the share of individual stoppages was analyzed and appropriate measures to prevent
incidents/accidents were recommended. The main causes of stoppages are isolated based on the frequency of occurrence, the percentage of the downtime duration in the total time spent and the level of danger. The primary cause of stoppages according to the mentioned criteria is the rupture of the hose in the observed machine with percentage participation in the duration of mechanical stoppages of 25.17%, with a frequency of 25% and a degree of danger of 6, while repairing the rod clamp is the second causal factor singled out as important from the risk aspect. Thanks to this, it is possible to plan maintenance activities and manage risks in an adequate way. The proposal for further research is further performance prediction and the determination of optimum operating parameters for different working conditions.
PB  - Elsevier
C3  - Procedia Structural Integrity
T1  - Methodology for Analysing Risk Factor on Surface Top Hammer Drill Rig
EP  - 103
IS  - C
SP  - 96
VL  - 48
DO  - 10.1016/j.prostr.2023.07.115
ER  - 

@conference{
author = "Brkić, Aleksandar and Spasojević Brkić, Vesna and Misita, Mirjana and Papić, Neda and Perišić, Martina and Janev, Nemanja",
year = "2023",
abstract = "Two-level risk mapping and assessment methodology was proposed with several criteria for risk prioritization (frequency of occurrence, downtime, level of danger, type of stoppage, cause of downtime, risk number). In a period of one year all stoppages, both planned and unplanned, were monitored and later on classified by type into: technological, mechanical, electrical, stoppages caused by the machine operator, external stoppages, which include stoppages of machine inactivity due to weather conditions and the like. The methodology proposed is oriented towards the calculation of risks to people, property, etc., which arise from various types of downtime. Then, based on the recording of data on stoppages of the observed machine, the structure of the share of individual stoppages was analyzed and appropriate measures to prevent
incidents/accidents were recommended. The main causes of stoppages are isolated based on the frequency of occurrence, the percentage of the downtime duration in the total time spent and the level of danger. The primary cause of stoppages according to the mentioned criteria is the rupture of the hose in the observed machine with percentage participation in the duration of mechanical stoppages of 25.17%, with a frequency of 25% and a degree of danger of 6, while repairing the rod clamp is the second causal factor singled out as important from the risk aspect. Thanks to this, it is possible to plan maintenance activities and manage risks in an adequate way. The proposal for further research is further performance prediction and the determination of optimum operating parameters for different working conditions.",
publisher = "Elsevier",
journal = "Procedia Structural Integrity",
title = "Methodology for Analysing Risk Factor on Surface Top Hammer Drill Rig",
pages = "103-96",
number = "C",
volume = "48",
doi = "10.1016/j.prostr.2023.07.115"
}

Brkić, A., Spasojević Brkić, V., Misita, M., Papić, N., Perišić, M.,& Janev, N.. (2023). Methodology for Analysing Risk Factor on Surface Top Hammer Drill Rig. in Procedia Structural Integrity
Elsevier., 48(C), 96-103.
https://doi.org/10.1016/j.prostr.2023.07.115

Brkić A, Spasojević Brkić V, Misita M, Papić N, Perišić M, Janev N. Methodology for Analysing Risk Factor on Surface Top Hammer Drill Rig. in Procedia Structural Integrity. 2023;48(C):96-103.
doi:10.1016/j.prostr.2023.07.115 .

Brkić, Aleksandar, Spasojević Brkić, Vesna, Misita, Mirjana, Papić, Neda, Perišić, Martina, Janev, Nemanja, "Methodology for Analysing Risk Factor on Surface Top Hammer Drill Rig" in Procedia Structural Integrity, 48, no. C (2023):96-103,
https://doi.org/10.1016/j.prostr.2023.07.115 . .

TY  - CONF
AU  - Spasojević Brkić, Vesna
AU  - Brkić, Aleksandar
AU  - Perišić, Martina
AU  - Misita, Mirjana
AU  - Janev, Nemanja
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6864
AB  - Risk management of engineering systems is of vital importance, but very often there
is no enough data to quantitatively evaluate risk and accordingly create risk management
strategy. Proper maintenance of excavators and bulldozers maximizes fuel efficiency and
reduces operating costs, as well as reduces equipment failure and enhances safety. Accordingly,
previous research opens avenue to analyze these two machinery types when working in mining
industry. This paper aims to create statistical comparisons on data collected about excavators’
and bulldozers’ as technological failure/stoppage, electrical failure/stoppage, mechanical
failure/stoppage, misuse, organizational failure/stoppage and external cause of
failure/stoppage. After performing descriptive statistics, hypothesis testing has not found
significant differences between technological failures/stoppages of excavators vs. bulldozers,
mechanical failures/stoppages between already mentioned machines or theirs hazard degrees
or total downtimes. Further research focus should be directed to the sample enlargement and
further analysis, which is expected to prove preliminary results.
PB  - Bor : University of Belgrade, Technical Faculty, Department of Engineering Management
C3  - International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia
T1  - EXCAVATOR’S AND BULLDOZER’S DOWNTIME COMPARISON AND RISK MANAGEMENT: PRELIMINARY STUDY
EP  - 308
IS  - 1
SP  - 301
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6864
ER  - 

@conference{
author = "Spasojević Brkić, Vesna and Brkić, Aleksandar and Perišić, Martina and Misita, Mirjana and Janev, Nemanja",
year = "2023",
abstract = "Risk management of engineering systems is of vital importance, but very often there
is no enough data to quantitatively evaluate risk and accordingly create risk management
strategy. Proper maintenance of excavators and bulldozers maximizes fuel efficiency and
reduces operating costs, as well as reduces equipment failure and enhances safety. Accordingly,
previous research opens avenue to analyze these two machinery types when working in mining
industry. This paper aims to create statistical comparisons on data collected about excavators’
and bulldozers’ as technological failure/stoppage, electrical failure/stoppage, mechanical
failure/stoppage, misuse, organizational failure/stoppage and external cause of
failure/stoppage. After performing descriptive statistics, hypothesis testing has not found
significant differences between technological failures/stoppages of excavators vs. bulldozers,
mechanical failures/stoppages between already mentioned machines or theirs hazard degrees
or total downtimes. Further research focus should be directed to the sample enlargement and
further analysis, which is expected to prove preliminary results.",
publisher = "Bor : University of Belgrade, Technical Faculty, Department of Engineering Management",
journal = "International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia",
title = "EXCAVATOR’S AND BULLDOZER’S DOWNTIME COMPARISON AND RISK MANAGEMENT: PRELIMINARY STUDY",
pages = "308-301",
number = "1",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6864"
}

Spasojević Brkić, V., Brkić, A., Perišić, M., Misita, M.,& Janev, N.. (2023). EXCAVATOR’S AND BULLDOZER’S DOWNTIME COMPARISON AND RISK MANAGEMENT: PRELIMINARY STUDY. in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia
Bor : University of Belgrade, Technical Faculty, Department of Engineering Management., 19(1), 301-308.
https://hdl.handle.net/21.15107/rcub_machinery_6864

Spasojević Brkić V, Brkić A, Perišić M, Misita M, Janev N. EXCAVATOR’S AND BULLDOZER’S DOWNTIME COMPARISON AND RISK MANAGEMENT: PRELIMINARY STUDY. in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia. 2023;19(1):301-308.
https://hdl.handle.net/21.15107/rcub_machinery_6864 .

Spasojević Brkić, Vesna, Brkić, Aleksandar, Perišić, Martina, Misita, Mirjana, Janev, Nemanja, "EXCAVATOR’S AND BULLDOZER’S DOWNTIME COMPARISON AND RISK MANAGEMENT: PRELIMINARY STUDY" in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia, 19, no. 1 (2023):301-308,
https://hdl.handle.net/21.15107/rcub_machinery_6864 .

TY  - CONF
AU  - Spasojević Brkić, Vesna
AU  - Petrović, Nikola
AU  - Bugarić, Uglješa
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7063
AB  - Risk based approach has been proven in generating utility in the mining industry by multiple authors. However, most of the previous research has focused on heavy machinery, neglecting the impact that auxiliary machines have in overall risk management. The following study aims to propose a risk assessment methodology for auxiliary machinery in open-pit mines based on the analysis of a hydraulic excavator maintenance data. The overall risk was defined in accordance with the FMEA method, as a product of three partial indicators: severity, occurrence and detection of failures. Failure type distribution and distinction were illustrated via Pareto chart with the goal to rate the detection indicator. The chi-square tests of downtime and time between failure data were following and enabled analytical determination of the system’s reliability and mean downtime, which led to evaluating the severity and occurrence of failures. Accordingly, framework for evaluation was proposed with a three dimensional risk assessment matrix as a result and proved on collected data.
PB  - Technical Faculty “Mihajlo Pupin”, Zrenjanin, University of Novi Sad
C3  - XIII International Conference Industrial Engineering and Environmental Protection (IIZS 2023), 5-6th October 2023., Zrenjanin, Serbia, 2023.
T1  - RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: CASE STUDY OF A HYDRAULIC EXCAVATOR
EP  - 207
SP  - 200
VL  - 13
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7063
ER  - 

@conference{
author = "Spasojević Brkić, Vesna and Petrović, Nikola and Bugarić, Uglješa",
year = "2023",
abstract = "Risk based approach has been proven in generating utility in the mining industry by multiple authors. However, most of the previous research has focused on heavy machinery, neglecting the impact that auxiliary machines have in overall risk management. The following study aims to propose a risk assessment methodology for auxiliary machinery in open-pit mines based on the analysis of a hydraulic excavator maintenance data. The overall risk was defined in accordance with the FMEA method, as a product of three partial indicators: severity, occurrence and detection of failures. Failure type distribution and distinction were illustrated via Pareto chart with the goal to rate the detection indicator. The chi-square tests of downtime and time between failure data were following and enabled analytical determination of the system’s reliability and mean downtime, which led to evaluating the severity and occurrence of failures. Accordingly, framework for evaluation was proposed with a three dimensional risk assessment matrix as a result and proved on collected data.",
publisher = "Technical Faculty “Mihajlo Pupin”, Zrenjanin, University of Novi Sad",
journal = "XIII International Conference Industrial Engineering and Environmental Protection (IIZS 2023), 5-6th October 2023., Zrenjanin, Serbia, 2023.",
title = "RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: CASE STUDY OF A HYDRAULIC EXCAVATOR",
pages = "207-200",
volume = "13",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7063"
}

Spasojević Brkić, V., Petrović, N.,& Bugarić, U.. (2023). RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: CASE STUDY OF A HYDRAULIC EXCAVATOR. in XIII International Conference Industrial Engineering and Environmental Protection (IIZS 2023), 5-6th October 2023., Zrenjanin, Serbia, 2023.
Technical Faculty “Mihajlo Pupin”, Zrenjanin, University of Novi Sad., 13, 200-207.
https://hdl.handle.net/21.15107/rcub_machinery_7063

Spasojević Brkić V, Petrović N, Bugarić U. RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: CASE STUDY OF A HYDRAULIC EXCAVATOR. in XIII International Conference Industrial Engineering and Environmental Protection (IIZS 2023), 5-6th October 2023., Zrenjanin, Serbia, 2023.. 2023;13:200-207.
https://hdl.handle.net/21.15107/rcub_machinery_7063 .

Spasojević Brkić, Vesna, Petrović, Nikola, Bugarić, Uglješa, "RELIABILITY-BASED RISK ASSESSMENT OF AUXILIARY MACHINERY IN OPEN-PIT MINES: CASE STUDY OF A HYDRAULIC EXCAVATOR" in XIII International Conference Industrial Engineering and Environmental Protection (IIZS 2023), 5-6th October 2023., Zrenjanin, Serbia, 2023., 13 (2023):200-207,
https://hdl.handle.net/21.15107/rcub_machinery_7063 .

TY  - CONF
AU  - Spasojević Brkić, Vesna
AU  - Golubović, Tamara
AU  - Sedmak, Aleksandar
AU  - Kirin, Snežana
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6771
AB  - During the last couple of decades, there was a definitive increase in the need for process safety control due to working conditions and systems becoming more complex, up to a point where the existing methodologies could no longer provide satisfying results. Hence, the topic of this paper involves the development of an original methodology for risk assessment of pressure equipment, based on fracture mechanics and the influence of human and organizational factors. This methodology resulted from the systemization of existing knowledge in the filed of process safety, innovations and integration of existing tools and models for risk assessment, as well as from improvements in working with pressure equipment in general and combining of above approaches with fracture mechanics, which allowed the solving of main issues that existed in these fields. This was achieved by establishing and verifying new methodologies and models, with particular focus on simplicity and adaptability to practical application, along with solving of problems related to the lack of systematic and practical approach to assessing of the influence of human and organizational factors on risk. In order to verify the newly proposed methodology, a case study was conducted in Serbia, related to Bajina Bašta hydropower plant, which confirmed the accuracy and simplicity of the methodology in question. It was shown that the application of this methodology enabled a systematic approach to quantitative risk assessment for pressure equipment in any and all companies which work with such equipment, regardless of their size or field of work. Thus, it was concluded that the proposed methodology has offered valuable insights, both to the scientific and public communities, through its improvement of process safety.
C3  - 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), April 2-4, 2023, Belgrade, Serbia
T1  - Methodology for pressure equipment risk assessment based on fracture mechanics and influence of human and organizational factors
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6771
ER  - 

@conference{
author = "Spasojević Brkić, Vesna and Golubović, Tamara and Sedmak, Aleksandar and Kirin, Snežana",
year = "2023",
abstract = "During the last couple of decades, there was a definitive increase in the need for process safety control due to working conditions and systems becoming more complex, up to a point where the existing methodologies could no longer provide satisfying results. Hence, the topic of this paper involves the development of an original methodology for risk assessment of pressure equipment, based on fracture mechanics and the influence of human and organizational factors. This methodology resulted from the systemization of existing knowledge in the filed of process safety, innovations and integration of existing tools and models for risk assessment, as well as from improvements in working with pressure equipment in general and combining of above approaches with fracture mechanics, which allowed the solving of main issues that existed in these fields. This was achieved by establishing and verifying new methodologies and models, with particular focus on simplicity and adaptability to practical application, along with solving of problems related to the lack of systematic and practical approach to assessing of the influence of human and organizational factors on risk. In order to verify the newly proposed methodology, a case study was conducted in Serbia, related to Bajina Bašta hydropower plant, which confirmed the accuracy and simplicity of the methodology in question. It was shown that the application of this methodology enabled a systematic approach to quantitative risk assessment for pressure equipment in any and all companies which work with such equipment, regardless of their size or field of work. Thus, it was concluded that the proposed methodology has offered valuable insights, both to the scientific and public communities, through its improvement of process safety.",
journal = "2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), April 2-4, 2023, Belgrade, Serbia",
title = "Methodology for pressure equipment risk assessment based on fracture mechanics and influence of human and organizational factors",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6771"
}

Spasojević Brkić, V., Golubović, T., Sedmak, A.,& Kirin, S.. (2023). Methodology for pressure equipment risk assessment based on fracture mechanics and influence of human and organizational factors. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), April 2-4, 2023, Belgrade, Serbia, 2.
https://hdl.handle.net/21.15107/rcub_machinery_6771

Spasojević Brkić V, Golubović T, Sedmak A, Kirin S. Methodology for pressure equipment risk assessment based on fracture mechanics and influence of human and organizational factors. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), April 2-4, 2023, Belgrade, Serbia. 2023;2.
https://hdl.handle.net/21.15107/rcub_machinery_6771 .

Spasojević Brkić, Vesna, Golubović, Tamara, Sedmak, Aleksandar, Kirin, Snežana, "Methodology for pressure equipment risk assessment based on fracture mechanics and influence of human and organizational factors" in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), April 2-4, 2023, Belgrade, Serbia, 2 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_6771 .

TY  - CONF
AU  - Mihajlović, Ivan
AU  - Stević, Željko
AU  - Spasojević Brkić, Vesna
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7438
AB  - This manuscript is presenting the process of development of the original software application, e.g. the tool, to be used in assessment of the resilience level and the safety climate indicators in the industrial organizations in the transport and mining sector. The initial data that was used to develop the app was collected using the questionnaire in which employees, segmented in five different organizational levels (e.g. transport and mining machines operators, support workers, first line managers, middle level managers and top level managers), were assessing the present state and the importance of each of the investigated safety indicators.
Based on this initial database the starting measurement model was developed that was used to develop the application which calculate the resilience levels of the organizations, based on adequate MCDA methods and four resilience corners approach.
PB  - University of Niš Faculty of mechanical engineering Department of Transport Engineering and Logistics
C3  - Proceedings of the ninth international conference transport and logistics
T1  - DEVELOPING THE TOOL FOR ASSESSING RESILIENCE AND SAFETY CLIMATE ASPECTS IN THE TRANSPORT AND MINING COMPANIES
EP  - 8
SP  - 5
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7438
ER  - 

@conference{
author = "Mihajlović, Ivan and Stević, Željko and Spasojević Brkić, Vesna",
year = "2023",
abstract = "This manuscript is presenting the process of development of the original software application, e.g. the tool, to be used in assessment of the resilience level and the safety climate indicators in the industrial organizations in the transport and mining sector. The initial data that was used to develop the app was collected using the questionnaire in which employees, segmented in five different organizational levels (e.g. transport and mining machines operators, support workers, first line managers, middle level managers and top level managers), were assessing the present state and the importance of each of the investigated safety indicators.
Based on this initial database the starting measurement model was developed that was used to develop the application which calculate the resilience levels of the organizations, based on adequate MCDA methods and four resilience corners approach.",
publisher = "University of Niš Faculty of mechanical engineering Department of Transport Engineering and Logistics",
journal = "Proceedings of the ninth international conference transport and logistics",
title = "DEVELOPING THE TOOL FOR ASSESSING RESILIENCE AND SAFETY CLIMATE ASPECTS IN THE TRANSPORT AND MINING COMPANIES",
pages = "8-5",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7438"
}

Mihajlović, I., Stević, Ž.,& Spasojević Brkić, V.. (2023). DEVELOPING THE TOOL FOR ASSESSING RESILIENCE AND SAFETY CLIMATE ASPECTS IN THE TRANSPORT AND MINING COMPANIES. in Proceedings of the ninth international conference transport and logistics
University of Niš Faculty of mechanical engineering Department of Transport Engineering and Logistics., 5-8.
https://hdl.handle.net/21.15107/rcub_machinery_7438

Mihajlović I, Stević Ž, Spasojević Brkić V. DEVELOPING THE TOOL FOR ASSESSING RESILIENCE AND SAFETY CLIMATE ASPECTS IN THE TRANSPORT AND MINING COMPANIES. in Proceedings of the ninth international conference transport and logistics. 2023;:5-8.
https://hdl.handle.net/21.15107/rcub_machinery_7438 .

Mihajlović, Ivan, Stević, Željko, Spasojević Brkić, Vesna, "DEVELOPING THE TOOL FOR ASSESSING RESILIENCE AND SAFETY CLIMATE ASPECTS IN THE TRANSPORT AND MINING COMPANIES" in Proceedings of the ninth international conference transport and logistics (2023):5-8,
https://hdl.handle.net/21.15107/rcub_machinery_7438 .

TY  - CONF
AU  - Mihajlović, Ivan
AU  - Perišić, Martina
AU  - Spasojević Brkić, Vesna
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7439
AB  - This research presents a comprehensive examination of the SWOT (Strengths, Weaknesses, Opportunities, Threats) and quantified TOWS (Threats, Opportunities, Weaknesses, Strengths) frameworks, aiming to elucidate their significance in strategic planning in the SME sector. The emphasis will be given to the SWOT analysis application that was developed with the aim of collecting and analyzing the responses of entrepreneurs and SMEs owners during self-evaluation of their businesses. The primary objective is to explore the potential of this tool to facilitate strategic decision-making and enhance organizational performance in SMEs. The research also seeks to uncover practical applications and limitations through empirical evidence and case studies in education.
PB  - University of Belgrade - Faculty of Organizational Sciences
C3  - 2nd International Danube Cup Conference on Entrepreneurship Education (IDC2E2 2023)
T1  - QUANTITATIVE SWOT-TOWS ANALYSIS BASED ON THE ENTREPRENEURS SELF EVALUATION
EP  - 158
SP  - 155
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7439
ER  - 

@conference{
author = "Mihajlović, Ivan and Perišić, Martina and Spasojević Brkić, Vesna",
year = "2023",
abstract = "This research presents a comprehensive examination of the SWOT (Strengths, Weaknesses, Opportunities, Threats) and quantified TOWS (Threats, Opportunities, Weaknesses, Strengths) frameworks, aiming to elucidate their significance in strategic planning in the SME sector. The emphasis will be given to the SWOT analysis application that was developed with the aim of collecting and analyzing the responses of entrepreneurs and SMEs owners during self-evaluation of their businesses. The primary objective is to explore the potential of this tool to facilitate strategic decision-making and enhance organizational performance in SMEs. The research also seeks to uncover practical applications and limitations through empirical evidence and case studies in education.",
publisher = "University of Belgrade - Faculty of Organizational Sciences",
journal = "2nd International Danube Cup Conference on Entrepreneurship Education (IDC2E2 2023)",
title = "QUANTITATIVE SWOT-TOWS ANALYSIS BASED ON THE ENTREPRENEURS SELF EVALUATION",
pages = "158-155",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7439"
}

Mihajlović, I., Perišić, M.,& Spasojević Brkić, V.. (2023). QUANTITATIVE SWOT-TOWS ANALYSIS BASED ON THE ENTREPRENEURS SELF EVALUATION. in 2nd International Danube Cup Conference on Entrepreneurship Education (IDC2E2 2023)
University of Belgrade - Faculty of Organizational Sciences., 155-158.
https://hdl.handle.net/21.15107/rcub_machinery_7439

Mihajlović I, Perišić M, Spasojević Brkić V. QUANTITATIVE SWOT-TOWS ANALYSIS BASED ON THE ENTREPRENEURS SELF EVALUATION. in 2nd International Danube Cup Conference on Entrepreneurship Education (IDC2E2 2023). 2023;:155-158.
https://hdl.handle.net/21.15107/rcub_machinery_7439 .

Mihajlović, Ivan, Perišić, Martina, Spasojević Brkić, Vesna, "QUANTITATIVE SWOT-TOWS ANALYSIS BASED ON THE ENTREPRENEURS SELF EVALUATION" in 2nd International Danube Cup Conference on Entrepreneurship Education (IDC2E2 2023) (2023):155-158,
https://hdl.handle.net/21.15107/rcub_machinery_7439 .

TY  - CONF
AU  - Janev, Nemanja
AU  - Spasojević Brkić, Vesna
AU  - Misita, Mirjana
AU  - Mihajlović, Ivan
AU  - Perišić, Martina
AU  - Papić, Neda
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7111
AB  - For the production planning process to be successful, an enterprise's internal business processes
must be effective and efficient, while the DMAIC cycle is important aspect of practice-based continuous
improvement. In accordance to those facts, this preliminary research includes the first part of the DMAIC
methodology - “define“ and “measure“ tools, applied to a case study in automotive industry, with the aim of
improving production planning processes. Analysis in “define“ phase starts with SIPOC, continues with
calculation of critical indicators in “measure“ phase and is followed by Pareto charts. Research shows that
the existing method of manual collection of production data is not precise enough, and during two months
observation period, between 14 and 52 percent of planned production time on 9 observed machines, passed
as unnoticed downtime. Further data analysis showed that this time is 1.5 to 9 times higher than the total
reported downtime on individual machines. Results show that the further development of data collection
tools is crucial, and the recommendation is to move in the direction of automation of that process in order
to make the most of available technical resources, in “improve“ phase and to “control“ it by statistical
comparison of previous and new state indicators
PB  - Industrial Innovation in Digital Age
C3  - Proceedings on 19th International Conference on Industrial Systems – IS’23
T1  - PRODUCTION PLANNING AND “DEFINE, MEASURE AND ANALYSIS“ TOOLS IN AUTOMOTIVE INDUSTRY AS PREREQUISITE OF AUTOMATION: A CASE STUDY
EP  - 395
SP  - 390
VL  - 19
DO  - 10.24867/IS-2023-T6.2-6_07541
ER  - 

@conference{
author = "Janev, Nemanja and Spasojević Brkić, Vesna and Misita, Mirjana and Mihajlović, Ivan and Perišić, Martina and Papić, Neda",
year = "2023",
abstract = "For the production planning process to be successful, an enterprise's internal business processes
must be effective and efficient, while the DMAIC cycle is important aspect of practice-based continuous
improvement. In accordance to those facts, this preliminary research includes the first part of the DMAIC
methodology - “define“ and “measure“ tools, applied to a case study in automotive industry, with the aim of
improving production planning processes. Analysis in “define“ phase starts with SIPOC, continues with
calculation of critical indicators in “measure“ phase and is followed by Pareto charts. Research shows that
the existing method of manual collection of production data is not precise enough, and during two months
observation period, between 14 and 52 percent of planned production time on 9 observed machines, passed
as unnoticed downtime. Further data analysis showed that this time is 1.5 to 9 times higher than the total
reported downtime on individual machines. Results show that the further development of data collection
tools is crucial, and the recommendation is to move in the direction of automation of that process in order
to make the most of available technical resources, in “improve“ phase and to “control“ it by statistical
comparison of previous and new state indicators",
publisher = "Industrial Innovation in Digital Age",
journal = "Proceedings on 19th International Conference on Industrial Systems – IS’23",
title = "PRODUCTION PLANNING AND “DEFINE, MEASURE AND ANALYSIS“ TOOLS IN AUTOMOTIVE INDUSTRY AS PREREQUISITE OF AUTOMATION: A CASE STUDY",
pages = "395-390",
volume = "19",
doi = "10.24867/IS-2023-T6.2-6_07541"
}

Janev, N., Spasojević Brkić, V., Misita, M., Mihajlović, I., Perišić, M.,& Papić, N.. (2023). PRODUCTION PLANNING AND “DEFINE, MEASURE AND ANALYSIS“ TOOLS IN AUTOMOTIVE INDUSTRY AS PREREQUISITE OF AUTOMATION: A CASE STUDY. in Proceedings on 19th International Conference on Industrial Systems – IS’23
Industrial Innovation in Digital Age., 19, 390-395.
https://doi.org/10.24867/IS-2023-T6.2-6_07541

Janev N, Spasojević Brkić V, Misita M, Mihajlović I, Perišić M, Papić N. PRODUCTION PLANNING AND “DEFINE, MEASURE AND ANALYSIS“ TOOLS IN AUTOMOTIVE INDUSTRY AS PREREQUISITE OF AUTOMATION: A CASE STUDY. in Proceedings on 19th International Conference on Industrial Systems – IS’23. 2023;19:390-395.
doi:10.24867/IS-2023-T6.2-6_07541 .

Janev, Nemanja, Spasojević Brkić, Vesna, Misita, Mirjana, Mihajlović, Ivan, Perišić, Martina, Papić, Neda, "PRODUCTION PLANNING AND “DEFINE, MEASURE AND ANALYSIS“ TOOLS IN AUTOMOTIVE INDUSTRY AS PREREQUISITE OF AUTOMATION: A CASE STUDY" in Proceedings on 19th International Conference on Industrial Systems – IS’23, 19 (2023):390-395,
https://doi.org/10.24867/IS-2023-T6.2-6_07541 . .

TY  - CONF
AU  - Spasojević Brkić, Vesna
AU  - Brkić, Aleksandar
AU  - Perišić, Martina
AU  - Veljković, Zorica
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6916
AB  - There are rare studies carried regarding the assessment of the anthropometric convenience of transport and mining machinery. The first aim of this paper is to examine if there are differences between transport and mining machinery operators from the aspect of foot controls, the second aim is to compare the most common causes of downtime and failure and the third aim is to compare if there are differences in the field of injuries at work of both machinery types. Samples of 31 transport and 65 mining machinery operators were examined. Analysis is done by using descriptive statistics, the Kolmogorov test for normality, Mann–Whitney U test, and Pareto analysis. Comparison of operators’ height and weight, vibrations feeling through the foot controls and its easiness to be reached and used/controlled and injuries rates have not shown statistically significant differences found between transport and mining machinery. Pareto analysis on failures and stoppages of both types of machinery found completely different causes in the field of “vital few”. Anyhow, since statistically proved facts show that there are no differences regarding safety and human factors issues it could be indicated to designers that there is the possibility of applying the same innovative solutions to both types of mechanization in the field of foot controls.
PB  - AHFE Open Acces
C3  - Human Factors and Systems Interaction
T1  - Transport and Mining Machinery Foot Controls: Safety and Human Factors View
EP  - 141
SP  - 134
VL  - 84
DO  - 10.54941/ahfe1003598
ER  - 

@conference{
author = "Spasojević Brkić, Vesna and Brkić, Aleksandar and Perišić, Martina and Veljković, Zorica",
year = "2023",
abstract = "There are rare studies carried regarding the assessment of the anthropometric convenience of transport and mining machinery. The first aim of this paper is to examine if there are differences between transport and mining machinery operators from the aspect of foot controls, the second aim is to compare the most common causes of downtime and failure and the third aim is to compare if there are differences in the field of injuries at work of both machinery types. Samples of 31 transport and 65 mining machinery operators were examined. Analysis is done by using descriptive statistics, the Kolmogorov test for normality, Mann–Whitney U test, and Pareto analysis. Comparison of operators’ height and weight, vibrations feeling through the foot controls and its easiness to be reached and used/controlled and injuries rates have not shown statistically significant differences found between transport and mining machinery. Pareto analysis on failures and stoppages of both types of machinery found completely different causes in the field of “vital few”. Anyhow, since statistically proved facts show that there are no differences regarding safety and human factors issues it could be indicated to designers that there is the possibility of applying the same innovative solutions to both types of mechanization in the field of foot controls.",
publisher = "AHFE Open Acces",
journal = "Human Factors and Systems Interaction",
title = "Transport and Mining Machinery Foot Controls: Safety and Human Factors View",
pages = "141-134",
volume = "84",
doi = "10.54941/ahfe1003598"
}

Spasojević Brkić, V., Brkić, A., Perišić, M.,& Veljković, Z.. (2023). Transport and Mining Machinery Foot Controls: Safety and Human Factors View. in Human Factors and Systems Interaction
AHFE Open Acces., 84, 134-141.
https://doi.org/10.54941/ahfe1003598

Spasojević Brkić V, Brkić A, Perišić M, Veljković Z. Transport and Mining Machinery Foot Controls: Safety and Human Factors View. in Human Factors and Systems Interaction. 2023;84:134-141.
doi:10.54941/ahfe1003598 .

Spasojević Brkić, Vesna, Brkić, Aleksandar, Perišić, Martina, Veljković, Zorica, "Transport and Mining Machinery Foot Controls: Safety and Human Factors View" in Human Factors and Systems Interaction, 84 (2023):134-141,
https://doi.org/10.54941/ahfe1003598 . .

TY  - JOUR
AU  - Spasojević Brkić, Vesna
AU  - Mihajlović, Ivan
AU  - Perišić, Martina
AU  - Janev, Nemanja
AU  - Rakonjac, Ivan
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6882
AB  - For mining processes to operate safely, information about safety is crucial. Numerous authors pay attention to fostering a good safety climate without paying attention to safety communication across organizational structure, which motivates this survey. Accordingly, this paper aims to check the hypothesis whether there is a difference between the attitudes of managers, operators, and auxiliary workers in the mining industry regarding safety communication, since differences on their attitudes about safety communication issues have potential to cause safety performance. A survey of 123 respondents working in different positions in Serbian mining companies, which have evaluated the importance of communication as well as the current state regarding the quality of communication in their organizations, was conducted. After evaluating the data and conducting descriptive statistics, followed by the Mann-Whitney test, it was determined that there are no statistically significant differences in the attitudes of managers, operators, and support staff toward safety communication. This indicates that issues with an organization's safety performance are not brought on by the differences on safety attitudes at different hierarchical levels. Proposal for the future research is to examine other possible causes, such as cognitive biases in risk perception, safety training and education and similar, and to use larger sample that may confirm our hypothesis.
PB  - Univerzitet u Novom Sadu - Tehnički fakultet Mihajlo Pupin, Zrenjanin
T2  - Journal of Engineering Management and Competitiveness (JEMC)
T1  - SAFETY COMMUNICATION IN MINING COMPANIES: DIFFERENCES ACROSS ORGANIZATIONAL STRUCTURE
EP  - 36
IS  - 1
SP  - 30
VL  - 13
DO  - 10.5937/JEMC2301030S
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6882
ER  - 

@article{
author = "Spasojević Brkić, Vesna and Mihajlović, Ivan and Perišić, Martina and Janev, Nemanja and Rakonjac, Ivan",
year = "2023",
abstract = "For mining processes to operate safely, information about safety is crucial. Numerous authors pay attention to fostering a good safety climate without paying attention to safety communication across organizational structure, which motivates this survey. Accordingly, this paper aims to check the hypothesis whether there is a difference between the attitudes of managers, operators, and auxiliary workers in the mining industry regarding safety communication, since differences on their attitudes about safety communication issues have potential to cause safety performance. A survey of 123 respondents working in different positions in Serbian mining companies, which have evaluated the importance of communication as well as the current state regarding the quality of communication in their organizations, was conducted. After evaluating the data and conducting descriptive statistics, followed by the Mann-Whitney test, it was determined that there are no statistically significant differences in the attitudes of managers, operators, and support staff toward safety communication. This indicates that issues with an organization's safety performance are not brought on by the differences on safety attitudes at different hierarchical levels. Proposal for the future research is to examine other possible causes, such as cognitive biases in risk perception, safety training and education and similar, and to use larger sample that may confirm our hypothesis.",
publisher = "Univerzitet u Novom Sadu - Tehnički fakultet Mihajlo Pupin, Zrenjanin",
journal = "Journal of Engineering Management and Competitiveness (JEMC)",
title = "SAFETY COMMUNICATION IN MINING COMPANIES: DIFFERENCES ACROSS ORGANIZATIONAL STRUCTURE",
pages = "36-30",
number = "1",
volume = "13",
doi = "10.5937/JEMC2301030S",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6882"
}

Spasojević Brkić, V., Mihajlović, I., Perišić, M., Janev, N.,& Rakonjac, I.. (2023). SAFETY COMMUNICATION IN MINING COMPANIES: DIFFERENCES ACROSS ORGANIZATIONAL STRUCTURE. in Journal of Engineering Management and Competitiveness (JEMC)
Univerzitet u Novom Sadu - Tehnički fakultet Mihajlo Pupin, Zrenjanin., 13(1), 30-36.
https://doi.org/10.5937/JEMC2301030S
https://hdl.handle.net/21.15107/rcub_machinery_6882

Spasojević Brkić V, Mihajlović I, Perišić M, Janev N, Rakonjac I. SAFETY COMMUNICATION IN MINING COMPANIES: DIFFERENCES ACROSS ORGANIZATIONAL STRUCTURE. in Journal of Engineering Management and Competitiveness (JEMC). 2023;13(1):30-36.
doi:10.5937/JEMC2301030S
https://hdl.handle.net/21.15107/rcub_machinery_6882 .

Spasojević Brkić, Vesna, Mihajlović, Ivan, Perišić, Martina, Janev, Nemanja, Rakonjac, Ivan, "SAFETY COMMUNICATION IN MINING COMPANIES: DIFFERENCES ACROSS ORGANIZATIONAL STRUCTURE" in Journal of Engineering Management and Competitiveness (JEMC), 13, no. 1 (2023):30-36,
https://doi.org/10.5937/JEMC2301030S .,
https://hdl.handle.net/21.15107/rcub_machinery_6882 .

TY  - JOUR
AU  - Janev, Nemanja
AU  - Spasojević Brkić, Vesna
AU  - Misita, Mirjana
AU  - Perišić, Martina
AU  - Papić, Neda
PY  - 2023
UR  - https://scindeks.ceon.rs/Article.aspx?artid=0040-21762305607J
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7112
AB  - The process of assembling micro components requires careful planning where precise and reliable data
collecting is necessary due to a short production cycle time. After determining the shortages of the
current data monitoring system, in this paper, by using the „Improve“ and „Control“ phases of DMAIC
cycle, the development and later testing of a new tool for automatic capture and analysis of data obtained
from the machine was done. SWOT analysis was used to establish the production site's and current
manufacturing execution system strengths and weaknesses, opportunities and threats, which were then
utilized to create the newly developed solution accurate and feasible. A tool calibration data was
obtained on 9 machines in automotive company's micro component assembly unit. To confirm the
accuracy of the data, a RunAtRate test was done on the machines, and by using hypothesis testing, the
initial reliability of the new solution was determined. Further testing and comparison revealed that the
newly proposed tool recorded 73-80% greater downtime and 40-50% more defective parts than the
previously installed system. Accordingly, the usefulness of the proposed Lean Six Sigma tool is
confirmed, and for periodic accuracy checks and further improve.ment, it is necessary to apply the PDCA
cycle.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - „Improve“ and „Control“ Tools in Assembly of Micro Components: A Case Study
EP  - 613
IS  - 5
SP  - 607
VL  - 78
DO  - 10.5937/tehnika2305607J
ER  - 

@article{
author = "Janev, Nemanja and Spasojević Brkić, Vesna and Misita, Mirjana and Perišić, Martina and Papić, Neda",
year = "2023",
abstract = "The process of assembling micro components requires careful planning where precise and reliable data
collecting is necessary due to a short production cycle time. After determining the shortages of the
current data monitoring system, in this paper, by using the „Improve“ and „Control“ phases of DMAIC
cycle, the development and later testing of a new tool for automatic capture and analysis of data obtained
from the machine was done. SWOT analysis was used to establish the production site's and current
manufacturing execution system strengths and weaknesses, opportunities and threats, which were then
utilized to create the newly developed solution accurate and feasible. A tool calibration data was
obtained on 9 machines in automotive company's micro component assembly unit. To confirm the
accuracy of the data, a RunAtRate test was done on the machines, and by using hypothesis testing, the
initial reliability of the new solution was determined. Further testing and comparison revealed that the
newly proposed tool recorded 73-80% greater downtime and 40-50% more defective parts than the
previously installed system. Accordingly, the usefulness of the proposed Lean Six Sigma tool is
confirmed, and for periodic accuracy checks and further improve.ment, it is necessary to apply the PDCA
cycle.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "„Improve“ and „Control“ Tools in Assembly of Micro Components: A Case Study",
pages = "613-607",
number = "5",
volume = "78",
doi = "10.5937/tehnika2305607J"
}

Janev, N., Spasojević Brkić, V., Misita, M., Perišić, M.,& Papić, N.. (2023). „Improve“ and „Control“ Tools in Assembly of Micro Components: A Case Study. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 78(5), 607-613.
https://doi.org/10.5937/tehnika2305607J

Janev N, Spasojević Brkić V, Misita M, Perišić M, Papić N. „Improve“ and „Control“ Tools in Assembly of Micro Components: A Case Study. in Tehnika. 2023;78(5):607-613.
doi:10.5937/tehnika2305607J .

Janev, Nemanja, Spasojević Brkić, Vesna, Misita, Mirjana, Perišić, Martina, Papić, Neda, "„Improve“ and „Control“ Tools in Assembly of Micro Components: A Case Study" in Tehnika, 78, no. 5 (2023):607-613,
https://doi.org/10.5937/tehnika2305607J . .

TY  - JOUR
AU  - Spasojević Brkić, Vesna
AU  - Misita, Mirjana
AU  - Perišić, Martina
AU  - Brkić, Aleksandar
AU  - Veljković, Zorica
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4111
AB  - Heavy mobile machinery cabs and their equipment are still not well adjusted to operators, so it is not surprising that we are still witnessing huge consequences of accidents at sites where they operate. The checklist with 39 questions, based on the previous research, is formed, and its’ measurement structure has been tested on the sample of 102 transport, construction, and mining machines, including cranes, excavators, bucket wheel excavators, bulldozers, loaders, graders, backhoe loaders, trenchers, dump trucks, and scrapers by correlation analysis, Cronbach’s alpha, Spearman-Brown and Kendall’s W coefficient, exploratory factor analysis, and confirmatory factor analysis. The results validate the measurement structure of a checklist with only 17 items and five constructs. The results show that special attention should be put to the design of armrests and working conditions/exhaust gases, which are negatively correlated to cab interior space and task visibility. All other correlations between seat characteristics, the characteristics of armrests, whole-body vibration influences, reaching commands, the characteristics of cab interior space and environments, and interpersonal relationships are positive, which means that improvements to one area lead to improvements in another. Accordingly, the proposed model should be used for the fast, efficient, and cost-effective evaluation of ergonomics risks and as a guideline for further cab design improvements.
PB  - MDPI
T2  - Mathematics
T1  - Validating Measurement Structure of Checklist for Evaluating Ergonomics Risks in Heavy Mobile Machinery Cabs
IS  - 1
SP  - 23
VL  - 11
DO  - 10.3390/math11010023
ER  - 

@article{
author = "Spasojević Brkić, Vesna and Misita, Mirjana and Perišić, Martina and Brkić, Aleksandar and Veljković, Zorica",
year = "2023",
abstract = "Heavy mobile machinery cabs and their equipment are still not well adjusted to operators, so it is not surprising that we are still witnessing huge consequences of accidents at sites where they operate. The checklist with 39 questions, based on the previous research, is formed, and its’ measurement structure has been tested on the sample of 102 transport, construction, and mining machines, including cranes, excavators, bucket wheel excavators, bulldozers, loaders, graders, backhoe loaders, trenchers, dump trucks, and scrapers by correlation analysis, Cronbach’s alpha, Spearman-Brown and Kendall’s W coefficient, exploratory factor analysis, and confirmatory factor analysis. The results validate the measurement structure of a checklist with only 17 items and five constructs. The results show that special attention should be put to the design of armrests and working conditions/exhaust gases, which are negatively correlated to cab interior space and task visibility. All other correlations between seat characteristics, the characteristics of armrests, whole-body vibration influences, reaching commands, the characteristics of cab interior space and environments, and interpersonal relationships are positive, which means that improvements to one area lead to improvements in another. Accordingly, the proposed model should be used for the fast, efficient, and cost-effective evaluation of ergonomics risks and as a guideline for further cab design improvements.",
publisher = "MDPI",
journal = "Mathematics",
title = "Validating Measurement Structure of Checklist for Evaluating Ergonomics Risks in Heavy Mobile Machinery Cabs",
number = "1",
pages = "23",
volume = "11",
doi = "10.3390/math11010023"
}

Spasojević Brkić, V., Misita, M., Perišić, M., Brkić, A.,& Veljković, Z.. (2023). Validating Measurement Structure of Checklist for Evaluating Ergonomics Risks in Heavy Mobile Machinery Cabs. in Mathematics
MDPI., 11(1), 23.
https://doi.org/10.3390/math11010023

Spasojević Brkić V, Misita M, Perišić M, Brkić A, Veljković Z. Validating Measurement Structure of Checklist for Evaluating Ergonomics Risks in Heavy Mobile Machinery Cabs. in Mathematics. 2023;11(1):23.
doi:10.3390/math11010023 .

Spasojević Brkić, Vesna, Misita, Mirjana, Perišić, Martina, Brkić, Aleksandar, Veljković, Zorica, "Validating Measurement Structure of Checklist for Evaluating Ergonomics Risks in Heavy Mobile Machinery Cabs" in Mathematics, 11, no. 1 (2023):23,
https://doi.org/10.3390/math11010023 . .

TY  - JOUR
AU  - Barcelo, Ernest
AU  - Dimić-Mišić, Katarina
AU  - Imani, Monir
AU  - Spasojević Brkić, Vesna
AU  - Hummel, Michael
AU  - Gane, Patrick
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4138
AB  - Nowadays, fossil fuels are used in a clearly unsustainable way that can bring potentially catastrophic consequences. Electricity is currently delivered to end users by generation and energy transmission companies. Previous research shows that the development of modern circular economy sets a need for the re-orientation of socio and economic development of decentralized systems, including energy basis. In addition to being ecological, the use of renewable energy sources also has economic significance by contributing to energy independence. Citizens, industries, local and national authorities become interconnected within emerging novel renewable energy sourcing communities, through which they establish trade of energy and, most importantly, models of investing and reshaping the distribution of renewable energy. The modern portfolio management of renewable energy networking is aiming toward decentralized systems of trade, where the consumer becomes a producer (prosumer) within the network, itself managed by users. Excess energy produced in the micro-grid nets within the over-arching national and transnational energy grid should be accounted for and managed with blockchain technology for financial and structural security. The decentralization of the energy market requires the establishment of strict norms that will regulate the market and taxation of profits arising. The extensive literature review on blockchain in the energy sector reflects a very pragmatic and narrow approach to the topic, although it is evident that the distribution of energy within the blockchain would enable economic development through reducing cost and ensuring more secure energy trade. Blockchain technology embeds the related digital codes, in which information will be visible to all, but also secured from hacking and duplicating. However, there are challenges to this paradigm, not least the energy consumption of the extensive nodal mesh required to perform the necessary protocols. This paper aims to provide an overview of the application of blockchain technology and the need for the development of the regulatory system and of potential solutions to the challenges posed. By undertaking an energy consumption analysis of blockchain implementation from first electronic principles, which has not been constructed before in the literature, this paper’s conclusion stresses the future demand for reducing energy consumption and considers the latest findings in the quantum coupling of light signals as a potential for solving the enormous ledger duplication structure problem.
PB  - MDPI
T2  - Sustainability
T1  - Regulatory Paradigm and Challenge for Blockchain Integration of Decentralized Systems: Example—Renewable Energy Grids
SP  - 2571
VL  - 15 (3)
DO  - 10.3390/su15032571
ER  - 

@article{
author = "Barcelo, Ernest and Dimić-Mišić, Katarina and Imani, Monir and Spasojević Brkić, Vesna and Hummel, Michael and Gane, Patrick",
year = "2023",
abstract = "Nowadays, fossil fuels are used in a clearly unsustainable way that can bring potentially catastrophic consequences. Electricity is currently delivered to end users by generation and energy transmission companies. Previous research shows that the development of modern circular economy sets a need for the re-orientation of socio and economic development of decentralized systems, including energy basis. In addition to being ecological, the use of renewable energy sources also has economic significance by contributing to energy independence. Citizens, industries, local and national authorities become interconnected within emerging novel renewable energy sourcing communities, through which they establish trade of energy and, most importantly, models of investing and reshaping the distribution of renewable energy. The modern portfolio management of renewable energy networking is aiming toward decentralized systems of trade, where the consumer becomes a producer (prosumer) within the network, itself managed by users. Excess energy produced in the micro-grid nets within the over-arching national and transnational energy grid should be accounted for and managed with blockchain technology for financial and structural security. The decentralization of the energy market requires the establishment of strict norms that will regulate the market and taxation of profits arising. The extensive literature review on blockchain in the energy sector reflects a very pragmatic and narrow approach to the topic, although it is evident that the distribution of energy within the blockchain would enable economic development through reducing cost and ensuring more secure energy trade. Blockchain technology embeds the related digital codes, in which information will be visible to all, but also secured from hacking and duplicating. However, there are challenges to this paradigm, not least the energy consumption of the extensive nodal mesh required to perform the necessary protocols. This paper aims to provide an overview of the application of blockchain technology and the need for the development of the regulatory system and of potential solutions to the challenges posed. By undertaking an energy consumption analysis of blockchain implementation from first electronic principles, which has not been constructed before in the literature, this paper’s conclusion stresses the future demand for reducing energy consumption and considers the latest findings in the quantum coupling of light signals as a potential for solving the enormous ledger duplication structure problem.",
publisher = "MDPI",
journal = "Sustainability",
title = "Regulatory Paradigm and Challenge for Blockchain Integration of Decentralized Systems: Example—Renewable Energy Grids",
pages = "2571",
volume = "15 (3)",
doi = "10.3390/su15032571"
}

Barcelo, E., Dimić-Mišić, K., Imani, M., Spasojević Brkić, V., Hummel, M.,& Gane, P.. (2023). Regulatory Paradigm and Challenge for Blockchain Integration of Decentralized Systems: Example—Renewable Energy Grids. in Sustainability
MDPI., 15 (3), 2571.
https://doi.org/10.3390/su15032571

Barcelo E, Dimić-Mišić K, Imani M, Spasojević Brkić V, Hummel M, Gane P. Regulatory Paradigm and Challenge for Blockchain Integration of Decentralized Systems: Example—Renewable Energy Grids. in Sustainability. 2023;15 (3):2571.
doi:10.3390/su15032571 .

Barcelo, Ernest, Dimić-Mišić, Katarina, Imani, Monir, Spasojević Brkić, Vesna, Hummel, Michael, Gane, Patrick, "Regulatory Paradigm and Challenge for Blockchain Integration of Decentralized Systems: Example—Renewable Energy Grids" in Sustainability, 15 (3) (2023):2571,
https://doi.org/10.3390/su15032571 . .

TY  - JOUR
AU  - Spasojević Brkić, Vesna
AU  - Mihajlović, Ivan
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4994
AB  - The contingent/contextual approach to the theory and practice of the organization arose in the 60s of the previous century, and its verification and empirical improvement are still ongoing, with increasing topicality and the presence of an increasingly strong trend of quantifying the influence of contingent/contextual factors and the increasing complexity of research with the same aim - it is expected that by mastering the effect of given factors, the overall efficiency of the company can be increased and that standardization in this field can bring great benefits. So far, the best researched and quantified is the impact of company size and technology on organizational structure factors. However, a large number of interdependencies are still not resolved among contingent factors, such as: a) the connection of decentralization with other contingent factors - company size, environment, etc., b) the influence of digitalization on the range of management, c) the direction of the influence of the degree of mass production on the number of hierarchical levels, d) the impact of innovation as a part of strategy on the organizational structure and many others. Various authors try to solve the above-mentioned questions, but the conclusions between them have not been confirmed so far; what's more, numerous results are released to the scientific public, which are mutually contradictory, as shown in the tabular presentation in the paper. In particular, the contribution of the latest version of the ISO 9001 standard from 2015, which for the first time recognizes the context in the given area, should be highlighted. Finally, it can be concluded that the empirical verification and theoretical enrichment of the contingent theory has been going on for decades, with the presence of an increasingly strong trend of quantifying the impact of contingent factors and the increasing complexity of research with the same goal - it is expected that mastering the effect of contingent factors can increase the overall efficiency of the company.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - TEHNIKA – MENADŽMENT
T1  - Development of Contingent/Contextual Theory: A State-of-the-Art Review
EP  - 88
IS  - 1
SP  - 77
VL  - 73
DO  - 10.5937/tehnika2301077S
ER  - 

@article{
author = "Spasojević Brkić, Vesna and Mihajlović, Ivan",
year = "2023",
abstract = "The contingent/contextual approach to the theory and practice of the organization arose in the 60s of the previous century, and its verification and empirical improvement are still ongoing, with increasing topicality and the presence of an increasingly strong trend of quantifying the influence of contingent/contextual factors and the increasing complexity of research with the same aim - it is expected that by mastering the effect of given factors, the overall efficiency of the company can be increased and that standardization in this field can bring great benefits. So far, the best researched and quantified is the impact of company size and technology on organizational structure factors. However, a large number of interdependencies are still not resolved among contingent factors, such as: a) the connection of decentralization with other contingent factors - company size, environment, etc., b) the influence of digitalization on the range of management, c) the direction of the influence of the degree of mass production on the number of hierarchical levels, d) the impact of innovation as a part of strategy on the organizational structure and many others. Various authors try to solve the above-mentioned questions, but the conclusions between them have not been confirmed so far; what's more, numerous results are released to the scientific public, which are mutually contradictory, as shown in the tabular presentation in the paper. In particular, the contribution of the latest version of the ISO 9001 standard from 2015, which for the first time recognizes the context in the given area, should be highlighted. Finally, it can be concluded that the empirical verification and theoretical enrichment of the contingent theory has been going on for decades, with the presence of an increasingly strong trend of quantifying the impact of contingent factors and the increasing complexity of research with the same goal - it is expected that mastering the effect of contingent factors can increase the overall efficiency of the company.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "TEHNIKA – MENADŽMENT",
title = "Development of Contingent/Contextual Theory: A State-of-the-Art Review",
pages = "88-77",
number = "1",
volume = "73",
doi = "10.5937/tehnika2301077S"
}

Spasojević Brkić, V.,& Mihajlović, I.. (2023). Development of Contingent/Contextual Theory: A State-of-the-Art Review. in TEHNIKA – MENADŽMENT
Beograd : Savez inženjera i tehničara Srbije., 73(1), 77-88.
https://doi.org/10.5937/tehnika2301077S

Spasojević Brkić V, Mihajlović I. Development of Contingent/Contextual Theory: A State-of-the-Art Review. in TEHNIKA – MENADŽMENT. 2023;73(1):77-88.
doi:10.5937/tehnika2301077S .

Spasojević Brkić, Vesna, Mihajlović, Ivan, "Development of Contingent/Contextual Theory: A State-of-the-Art Review" in TEHNIKA – MENADŽMENT, 73, no. 1 (2023):77-88,
https://doi.org/10.5937/tehnika2301077S . .

TY  - CONF
AU  - Perišić, Natalija
AU  - Spasojević Brkić, Vesna
AU  - Jovanović, Radiša
AU  - Mihajlović, Ivan
AU  - Perišić, Martina
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6863
AB  - A company’s development performance and growth may be impacted by a wide range
of different factors, which unquestionably affect number of the employees in the loop. Taking into
account all influencing factors, companies would benefit if have possibility to predict the degree of
change in the number of employees in future period in order to adjust their internal strategy or to
make appropriate decisions that enable the survival and progress of the company in the market. The
aim of this research is to predict the change in number of employees based on current state of
contingency and quality management factors, using information obtained from a survey of 67
different companies from Serbia. In the first part of the research, a correlation analysis is used with
the aim to identify the specific contingency and quality management factors that are most closely
associated to the subject of interest, which is, in this case, degree of change in the number of
employes. The second part of the research involves feedforward neural network training for
prediction of the degree of change in number of employees based on feature extraction of main
factors. The training accuracy that proposed network achieved is 77.36%, while testing accuracy
amounts 71.43%.
PB  - Bor : University of Belgrade, Technical Faculty, Department of Engineering Management
C3  - International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia
T1  - PREDICTION OF THE CHANGE IN NUMBER OF EMPLOYEES IN SERBIAN COMPANIES BASED ON CONTINGENCY AND QUALITY MANAGEMENT FACTORS
EP  - 48
IS  - 1
SP  - 39
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6863
ER  - 

@conference{
author = "Perišić, Natalija and Spasojević Brkić, Vesna and Jovanović, Radiša and Mihajlović, Ivan and Perišić, Martina",
year = "2023",
abstract = "A company’s development performance and growth may be impacted by a wide range
of different factors, which unquestionably affect number of the employees in the loop. Taking into
account all influencing factors, companies would benefit if have possibility to predict the degree of
change in the number of employees in future period in order to adjust their internal strategy or to
make appropriate decisions that enable the survival and progress of the company in the market. The
aim of this research is to predict the change in number of employees based on current state of
contingency and quality management factors, using information obtained from a survey of 67
different companies from Serbia. In the first part of the research, a correlation analysis is used with
the aim to identify the specific contingency and quality management factors that are most closely
associated to the subject of interest, which is, in this case, degree of change in the number of
employes. The second part of the research involves feedforward neural network training for
prediction of the degree of change in number of employees based on feature extraction of main
factors. The training accuracy that proposed network achieved is 77.36%, while testing accuracy
amounts 71.43%.",
publisher = "Bor : University of Belgrade, Technical Faculty, Department of Engineering Management",
journal = "International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia",
title = "PREDICTION OF THE CHANGE IN NUMBER OF EMPLOYEES IN SERBIAN COMPANIES BASED ON CONTINGENCY AND QUALITY MANAGEMENT FACTORS",
pages = "48-39",
number = "1",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6863"
}

Perišić, N., Spasojević Brkić, V., Jovanović, R., Mihajlović, I.,& Perišić, M.. (2023). PREDICTION OF THE CHANGE IN NUMBER OF EMPLOYEES IN SERBIAN COMPANIES BASED ON CONTINGENCY AND QUALITY MANAGEMENT FACTORS. in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia
Bor : University of Belgrade, Technical Faculty, Department of Engineering Management., 19(1), 39-48.
https://hdl.handle.net/21.15107/rcub_machinery_6863

Perišić N, Spasojević Brkić V, Jovanović R, Mihajlović I, Perišić M. PREDICTION OF THE CHANGE IN NUMBER OF EMPLOYEES IN SERBIAN COMPANIES BASED ON CONTINGENCY AND QUALITY MANAGEMENT FACTORS. in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia. 2023;19(1):39-48.
https://hdl.handle.net/21.15107/rcub_machinery_6863 .

Perišić, Natalija, Spasojević Brkić, Vesna, Jovanović, Radiša, Mihajlović, Ivan, Perišić, Martina, "PREDICTION OF THE CHANGE IN NUMBER OF EMPLOYEES IN SERBIAN COMPANIES BASED ON CONTINGENCY AND QUALITY MANAGEMENT FACTORS" in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia, 19, no. 1 (2023):39-48,
https://hdl.handle.net/21.15107/rcub_machinery_6863 .