EXCAVATOR’S AND BULLDOZER’S DOWNTIME COMPARISON AND RISK MANAGEMENT: PRELIMINARY STUDY

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.