Optimal maintenance strategy for systems with two failure modes

Rui Peng, Bin Liu, Qingqing Zhai and Wenbin Wang

Reliability Engineering and System Safety, 2019, vol. 188, issue C, 624-632

Abstract: This paper considers a single-unit system subject to two types of failures: a traditional catastrophic failure and a two-stage delayed failure. Periodic inspections are carried out to identify the defective stage of the two-stage failure process, whereas preventive replacements are implemented to avoid any potential failure due to the catastrophic failure mode. We construct a basic maintenance model and then extend it to the cases of imperfect inspections (i.e., inspections that do not always notice a defective state). We analyze the renewal process of the system and establish the expected long-run cost rate (ELRCR). The optimal inspection period and preventive replacement interval are determined by minimizing the ELRCR. A case study on infusion pumps is presented to illustrate the proposed model.

Keywords: Periodic inspection; Preventive replacement; Delay-time; Two-stage failure process; Imperfect inspection (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (14)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:188:y:2019:i:c:p:624-632

DOI: 10.1016/j.ress.2017.07.014

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