2013
EMSS 2013 Proceeding
Modeling a wrong maintenance policy
Authors: Diego D?Urso
Abstract
The behavior of a single unit system, which is maintained according to the preventive policy, despite it fails with a constant failure rate, is focused. A discrete event simulation (DES) enables to compare the expected number of failures that belong to alternative maintenance scenarios the corrective and the preventive one. The results comparison shows, at a first glance, that the preventive maintenance has to be preferred. A deeper analysis, based on the information content registered at each step of a simulation process, on the Skellam function properties and on the Small Number Law, helps to clarify this strange behavior. The real aim of modeling such a system would be to refuse the constant failure rate as an operations statement but only as a missing-information maintenance state. The simulation model enables to find more comprehensive information content about the behavior of stochastic single unit maintenance.
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