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A study of postponed replacement in a delay time model

机译：在延迟时间模型中推迟更换的研究

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We develop a delay time model for a one component system with postponed replacement to analyze situations in which maintenance might not be executed immediately upon discovery of a defect in the system. Reasons for postponement are numerous: to avoid production disruption or unnecessary or ineffective replacement; to prepare for replacement; to extend component life; to wait for an opportunity. This paper explores conditions that make postponement cost-effective. We are interested in modelling the reality in which a maintainer either prioritizes functional continuity or is not confident of the inspection test indicating a defective state. In some cases more frequent inspection and a longer time limit for postponement are recommended to take advantage of maintenance opportunities, characterized by their low cost, arising after a positive inspection. However, when the cost of failure increases, a significant reduction in the time limit of postponement interval is observed. The examples reveal that both the time to defect arrival and delay time have a significant effect upon the cost-effectiveness of maintenance at the limit of postponement. Also, more simply, we fmd that opportunities must occur frequently enough and inspection should be a high quality procedure to risk postponement. (C) 2017 Elsevier Ltd. All rights reserved.
机译：我们开发了具有延迟更换功能的单组件系统的延迟时间模型，以分析在发现系统缺陷后可能不会立即执行维护的情况。推迟的原因很多：避免生产中断或不必要或无效的更换；准备更换；延长组件寿命；等待机会。本文探讨了使推迟具有成本效益的条件。我们对建模这一现实感兴趣，在这种现实中，维护人员要么优先考虑功能连续性，要么对检查测试表明存在缺陷状态不抱有信心。在某些情况下，建议使用更频繁的检查和更长的延迟时间，以利用积极检查后产生的维护成本低廉的维护机会。但是，当故障成本增加时，可以观察到延迟间隔时间的显着减少。这些示例表明，缺陷到达的时间和延迟时间都对维护的成本效益产生了显着的影响，而这种影响是在延迟的极限范围内进行的。同样，更简单地说，我们认为机会必须足够频繁地发生，并且检查应该是避免延迟的高质量程序。 （C）2017 Elsevier Ltd.保留所有权利。

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