期刊
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
卷 61, 期 15, 页码 5212-5227出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00207543.2022.2099319
关键词
Cost model; degradation-shock dependence system; expected cost rate; optimal replacement age; repair-replacement policy
This paper proposes a condition-based maintenance strategy for a degradation-shock dependence system. The paper develops a reliability model and conducts a warranty cost analysis to optimize the warranty strategy. The study considers the dependence between degradation and random shocks and investigates different types of shocks and their effects on system degradation.
In this paper, we derive a condition-based maintenance strategy for a degradation-shock dependence system subject to two causes of failure, degradation and random shocks. We develop a reliability model for a system under warranty for failure in which we consider the dependence between the degradation process and random shocks and do a warranty cost analysis based on the suggested model. We consider a degradation-shock dependence system that is under warranty with three separate services: repair, replacement, and preventive maintenance. These are triggered when a product degradation crosses one of three predetermined degradation thresholds. We also investigate the dependence between random shocks and degradation modelled by a time-scaled covariate factor. We study the random shock considering fatal shocks that require replacement and nonfatal shocks that require only repair and the degradation caused by nonfatal shocks. The condition-based maintenance strategy for a degradation-shock dependence system is a novel approach to analysing system degradation, with a goal of optimising warranty costs; we also minimise the expected total system cost to find an optimal warranty length. We present several numeric examples and real-world applications to illustrate our proposed approach.
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