Optimization of continuous and discrete scheduled times for a cumulative damage system with age-dependent maintenance

Chin-Chih Chang and Yen-Luan Chen

Communications in Statistics - Theory and Methods, 2019, vol. 48, issue 17, 4261-4277

Abstract: This paper presents a preventive replacement problem when a system is operating successive works with random times and suffering stochastic shocks. The works cause random amount additive damage to the system, and the system fails whenever the cumulative damage reaches a failure level threshold. As an external shock occurs, the system experiences one of the two types of shocks with age-dependent maintenance mechanism: type-I (minor) shock is rectified by a minimal repair, or type-II (catastrophic) shock causes the system to fail. To control the deterioration process, preventive replacement is scheduled to replace the system at a continuous age T or at a discrete number N of working cycles, whichever occurs first, and corrective replacement is performed immediately whenever the system fails due to either shock or damage. The optimal preventive replacement schedule that minimizes the expected cost rate is discussed analytically and computed numerically. The proposed model provides a general framework for analyzing maintenance policies and extends several existing results.

Date: 2019
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DOI: 10.1080/03610926.2018.1491992

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