Abstract
The paper demonstrates the dependence of a fleet reserve of buses on the maintenance policy of the whole fleet, in particular, condition-based maintenance using a motor oil degradation analysis. The paper discusses an approach to evaluate the oil degradation and the prediction of the next value for one relevant oil variable. The methodology to evaluate the reserve fleet is based on bus availability, estimated through the mean time between failures and the mean time to repair ratios. Through the use of econometric models, it is possible to determine the most rational size of the reserve fleet.
Highlights
Buses in the reserve fleet of a mass transit bus company are used to replace vehicles undergoing regularly planned maintenance
The methodology to evaluate the reserve fleet is based on bus availability, estimated through the mean time between failures and the mean time to repair ratios
It considers the use of the analysis of lubricating oils of Diesel engines to determine the replacement time of urban passenger buses, integrating this approach to determine the optimal size of a reserve fleet
Summary
Buses in the reserve fleet of a mass transit bus company are used to replace vehicles undergoing regularly planned maintenance. They can be called upon in emergency situations, like accidents or unexpected breakdowns. This paper approaches the issue through the effect of maintenance efficiency on bus availability It considers the use of the analysis of lubricating oils of Diesel engines to determine the replacement time of urban passenger buses, integrating this approach to determine the optimal size of a reserve fleet. The paper evaluates the influence of a condition monitoring maintenance policy on the costs of a bus’s lifecycle, on the determination of the time of replacement, and on the size of the reserve fleet.
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