A Condition-Based Maintenance Policy Considering Batch Sizes for Warm Standby Systems With Priority to Repair

Abstract

In this article, a novel condition-based maintenance (CBM) policy for a two-component warm standby system is proposed. In contrast to the traditional models of warm standby systems, joint optimization of batch sizes and CBM policy is investigated. From the just-in-time view, traditional mass production is divided into different small-batch production, and the small moving batches are applied in the presented model. In the active switching strategy, in addition to the common failure switching, preventive switching of components is also considered. The components' condition in the system can be assessed by periodic inspections, and preventive maintenance (PM) or corrective maintenance is performed once the degradation level of one component exceeds the maintenance threshold. The optimal size of small moving batches and PM threshold are derived by minimizing the long-term average total cost rate. Finally, a numerical example and sensitivity analysis are adopted to demonstrate the effectiveness of the policy.