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On the effect of downtime costs and budget constraint on preventive and replacement policies

机译：停机成本和预算约束对预防和更换政策的影响

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摘要

This work proposes a general approach to study and improve the effectiveness of the system with respect to its expected life-cycle cost rate. The model we propose considers a production system which is protected against demand fluctuations and failure occurrences with elements like stock piles, line and equipment redundancy, and the use of alternative production methods. These design policies allow to keep or minimize the effect on the nominal throughput, while corrective measures are taken. The system is also subject to an aging process which depends on the frequency and quality of preventive actions. Making decisions is difficult because of discontinuities in intervention and downtime costs and the limited budget. We present a non-linear mixed integer formulation that minimizes the expected overall cost rate with respect to repair, overhaul and replacement times and the overhaul improvement factor proposed in the literature. The model is deterministic and considers minimal repairs and imperfect overhauls. We illustrate its application with a case based on a known benchmark example.
机译：这项工作提出了一种一般的方法来研究和提高系统在预期生命周期成本率方面的有效性。我们建议的模型考虑了一个生产系统，该系统可以防止需求波动和故障事件的发生，例如库存堆，生产线和设备冗余以及使用替代生产方法。这些设计策略允许在采取纠正措施的同时保持或最小化对标称吞吐量的影响。系统还会经历老化过程，这取决于预防措施的频率和质量。由于干预和停机成本的不连续性以及有限的预算，因此难以做出决策。我们提出了一种非线性混合整数公式，该公式将有关维修，大修和更换时间以及文献中提出的大修改进系数的预期总成本率降至最低。该模型是确定性的，并考虑了最少的维修和不完善的大修。我们以一个已知的基准示例为例来说明其应用。

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