In this day of automation, effective maintenance decisions are a legitimate concern. This paper broadens the traditional concept of maintenance to include any policies which tend to reduce the frequency or severity of failures. A simulation model is used to demonstrate the inter‐relatedness of multiple maintenance policies for a truck depot. It is demonstrated that the proper selection of a maintenance policy set should consider the variability of the system outputs due to the daily dynamics, as well as the transient behavior of the system. It is also shown that the choice of an appropriate maintenance policy should recognize the distribution of total annual costs and should not base the analysis solely upon average total annual costs.
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Hardy et al. (1975) studied this question.