Introduction

Abstract

AbstractMaintenance is an essential activity and a critical element in the lifecycle management of engineered systems. Maintenance optimization aims to determine the optimum maintenance tasks that minimize system downtime with the lowest possible costs or to maximize system reliability/availability under cost constraints. Selective maintenance aims to select only a subset of feasible maintenance actions to be performed for a repairable system owing to limited maintenance resources. It has been extensively studied over the past decade. This chapter provides a systematic review that focuses on maintenance optimization, particularly the selective maintenance optimization problem. First, an overview of maintenance optimization is provided. Maintenance optimization is distinguished from seven different criteria: maintenance paradigms, system degradation characteristics, maintenance efficiencies, inspection strategies, multi-component systems with dependencies, maintenance objectives, and optimization algorithms. Second, we conduct a deep literature review of selective maintenance problems from the perspectives of system modelling, efficiency of maintenance actions, constraints of maintenance resources, mission characteristics, operating environment, and optimization algorithms.KeywordsSelective maintenanceMulti-state systemMaintenance optimization