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Optimal spare ordering policy for preventive replacement under cost effectiveness criterion

机译：根据成本效益标准进行预防性更换的最优备件订购策略

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摘要

This paper presents a spare ordering policy for preventive replacement with age-dependent minimal repair and salvage value consideration. The spare unit for replacement is available only by order and the lead-time for delivering the spare due to regular or expedited ordering follows general distributions. To analyze the ordering policy, the failure process is modelled by a non-homogeneous Poisson process. By introducing the costs due to ordering, repairs, replacements and downtime, as well as the salvage value of an un-failed system, the expected cost effectiveness in the long run are derived as a criterion of optimal-ity. It is shown, under certain conditions, there exists a finite and unique optimum ordering time which maximizes the expected cost effectiveness. Finally, numerical examples are given for illustration.
机译：本文介绍了一种备用订购策略，用于预防性更换，其更换取决于年龄的最小修理和残值。用于更换的备用零件仅可通过订购获得，由于常规或加急订购而交付备用零件的交货时间遵循一般分配。为了分析订购策略，通过非均匀泊松过程对失效过程进行建模。通过引入因订购，维修，更换和停机所引起的成本以及未失效系统的残值，可以得出长期的预期成本效益，以此作为最佳性的标准。结果表明，在某些条件下，存在有限且唯一的最佳订购时间，该订购时间可最大化预期的成本效益。最后，给出了数字示例进行说明。

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