Optimal modular decomposition for minimizing cost of preventive maintenance under target availability

초록

This study considers a system that consists of multiple deteriorating and replaceable components, and assumes that all of them are replaced in a preventive maintenance mode. A modular replacement unit is considered rather than replacing individual component independently; where any component in a module needs to be replaced, the whole module is replaced all together. Small modules are economic, but degrade availability of the system due to frequent maintenance stops. Large modules are expensive, but enhance availability by reducing maintenance frequency. This study proposes a linear-integer programming model to find the optimal modules that minimize the long-run average cost under a target availability. It explores a solution under flexible decomposition structures which has never been allowed in the previous studies. © 2018, ICIC International. All rights reserved.

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