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  - 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 .

TY  - CONF
AU  - Ćosović, Ermina
AU  - Mihajlović, Ivan
AU  - Spasojević Brkić, Vesna
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6865
AB  - The world is globalized and highly dependent on efficient supply chains, so
logistics activities and suppliers are becoming more and more important under such
conditions. Supplier selection represents a multi-criteria decision-making problem, where the
decision is influenced by several mutually conflicting factors in the procurement process,
therefore a trade-off analysis between the defined criteria must be performed. The supplier
selection process would be simple if only one criterion influences the decision. However, in
most cases decision makers must consider a number of criteria when making this appropriate
decision. Taking into account the problems that companies may have due to an inadequate
selection of suppliers, starting from the wrong quantities assessment when purchasing
materials, or preferring only one criterion (eg price), as well as other problems, the AHP
model represents a possible solution so that, in the process of selecting suppliers, errors are
eliminated or reduced to a minimum.
The subject of this research paper is the multi-criteria selection of suppliers using the AHP
methodology with the help of the Expert Choice 11 software package. The aim of the research
is the ranking of suppliers based on defined decision criteria.
C3  - International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia
T1  - MULTI-CRITERIA SELECTION OF SUPPLIERS USING THE AHP METHOD AND THE EXPERT CHOICE SOFTWARE PACKAGE
EP  - 465
IS  - 1
SP  - 457
VL  - 19
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6865
ER  - 

@conference{
author = "Ćosović, Ermina and Mihajlović, Ivan and Spasojević Brkić, Vesna",
year = "2023",
abstract = "The world is globalized and highly dependent on efficient supply chains, so
logistics activities and suppliers are becoming more and more important under such
conditions. Supplier selection represents a multi-criteria decision-making problem, where the
decision is influenced by several mutually conflicting factors in the procurement process,
therefore a trade-off analysis between the defined criteria must be performed. The supplier
selection process would be simple if only one criterion influences the decision. However, in
most cases decision makers must consider a number of criteria when making this appropriate
decision. Taking into account the problems that companies may have due to an inadequate
selection of suppliers, starting from the wrong quantities assessment when purchasing
materials, or preferring only one criterion (eg price), as well as other problems, the AHP
model represents a possible solution so that, in the process of selecting suppliers, errors are
eliminated or reduced to a minimum.
The subject of this research paper is the multi-criteria selection of suppliers using the AHP
methodology with the help of the Expert Choice 11 software package. The aim of the research
is the ranking of suppliers based on defined decision criteria.",
journal = "International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia",
title = "MULTI-CRITERIA SELECTION OF SUPPLIERS USING THE AHP METHOD AND THE EXPERT CHOICE SOFTWARE PACKAGE",
pages = "465-457",
number = "1",
volume = "19",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6865"
}

Ćosović, E., Mihajlović, I.,& Spasojević Brkić, V.. (2023). MULTI-CRITERIA SELECTION OF SUPPLIERS USING THE AHP METHOD AND THE EXPERT CHOICE SOFTWARE PACKAGE. in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia, 19(1), 457-465.
https://hdl.handle.net/21.15107/rcub_machinery_6865

Ćosović E, Mihajlović I, Spasojević Brkić V. MULTI-CRITERIA SELECTION OF SUPPLIERS USING THE AHP METHOD AND THE EXPERT CHOICE SOFTWARE PACKAGE. in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia. 2023;19(1):457-465.
https://hdl.handle.net/21.15107/rcub_machinery_6865 .

Ćosović, Ermina, Mihajlović, Ivan, Spasojević Brkić, Vesna, "MULTI-CRITERIA SELECTION OF SUPPLIERS USING THE AHP METHOD AND THE EXPERT CHOICE SOFTWARE PACKAGE" in International May Conference on Strategic Management – IMCSM23 May, 2023, Bor, Serbia, 19, no. 1 (2023):457-465,
https://hdl.handle.net/21.15107/rcub_machinery_6865 .