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Condition based maintenance in the context of opportunistic maintenance

机译：机会性维护中基于条件的维护

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Condition based maintenance (CBM) uses the operating condition of a component to predict a failure event. Compared to age based replacement (ABR), CBM usually results in higher availability and lower maintenance costs, since it tries to prevent unplanned downtime and avoid unnecessary preventive maintenance activities for a component. However, the superiority of CBM remains unclear in multi-component systems, in which opportunistic maintenance strategies can be applied. Opportunistic maintenance aims to group maintenance activities of two or more components in order to reduce maintenance costs. In a serial system, this may also result in less downtime of the production line. The aim of this paper is to examine the impact of opportunistic maintenance on the effectiveness of CBM. We simulate a small system consisting of three components in series and vary the number of components under a CBM policy, the length of the opportunistic maintenance zone, the cost benefits of grouping maintenance activities, and the chance of a failure occurrence within a preventive maintenance (PM) interval. The results show that within the current experimental settings, CBM remains cost effective in the multi-component serial system, but is less effective than ABR in grouping maintenance activities. When the chance of failure is small and the length of the opportunistic maintenance zone is large, ABR may eve be a better option if line productivity is important.
机译：基于状况的维护（CBM）使用组件的运行状况来预测故障事件。与基于时间的替换（ABR）相比，CBM通常会提高可用性并降低维护成本，因为它试图防止计划外的停机时间并避免对组件进行不必要的预防性维护活动。但是，煤层气的优势在多组件系统中仍然不清楚，在多组件系统中可以应用机会维护策略。机会性维护旨在将两个或多个组件的维护活动分组，以降低维护成本。在串行系统中，这还可以减少生产线的停机时间。本文的目的是检验机会性维护对煤层气有效性的影响。我们模拟一个由三个组成部分组成的小型系统，并根据CBM策略更改组成部分的数量，机会性维护区域的长度，将维护活动分组的成本收益以及预防性维护中发生故障的可能性（ PM）间隔。结果表明，在当前的实验环境中，CBM在多组件串行系统中仍然具有成本效益，但在分组维护活动方面不如ABR有效。当发生故障的机会很小并且机会性维护区的长度很大时，如果生产线的生产率很重要，则ABR可能会是一个更好的选择。

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