Joint optimization of imperfect preventive opportunistic maintenance and spare parts inventory for multi-unit systems considering spare parts reuse

Xinlong Li, Shuai Jiang, Baojia Chen, Fafa Chen, Youjun An, Yan Ran and Genbao Zhang

Reliability Engineering and System Safety, 2025, vol. 261, issue C

Abstract: Developing an appropriate maintenance and spare parts inventory strategy is an effective means to ensure the safe and reliable operation of the system. Currently, the joint optimization research of maintenance and spare parts inventory strategy for multi-unit systems neglects the reuse of the unit after maintenance, which wastes maintenance resources and increases maintenance costs. In addition, in order to facilitate modeling and calculation, time parameters related to preventive maintenance are ignored, and the differentiated effects of preventive maintenance on different types of unit failures are also not considered, so the strategy developed is not accurate. In this paper, considering the differential effects of preventive maintenance on different types of unit failures, maintenance strategies at unit-level are formulated first. Then, the costs involved are analyzed, the joint optimization model of imperfect opportunistic maintenance based on dynamic time window and spare parts inventory for multi-unit system is established, which takes into account the time parameters related to preventive maintenance and the reuse of the unit after maintenance. Furthermore, the solution algorithm of the model is designed. Finally, a numerical example is provided to demonstrate the effectiveness and superiority of the proposed method.

Keywords: Opportunistic maintenance; Multi-unit systems; Spare parts inventory; Imperfect maintenance; Maintenance optimization (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:261:y:2025:i:c:s0951832025003631

DOI: 10.1016/j.ress.2025.111162

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