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首页> 外文会议>International conference of the system dynamics society >The Role of Overhaul in Reducing Lifecycle Costs and Maximizing the Return on Investments to Improve Reliability
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The Role of Overhaul in Reducing Lifecycle Costs and Maximizing the Return on Investments to Improve Reliability

机译：改革的作用降低生命周期成本并最大限度地提高投资回报以提高可靠性

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Maintaining military aircraft in a high state of readiness requires a non-stop flow of spare parts. These replacement parts can either be new parts from procurement or repaired parts coming from overhaul. The cost of these replacement parts is a major component of total lifecycle operating and sustainment costs. Improvements in reliability can potentially reduce removals and these on-going costs. The overall cost reduction depends upon the interaction over time of any increase in the cost of the new improved part, the increase in reliability, changing demand levels and the role of overhaul. Three overhaul scenarios are examined for cases of improved reliability: (i) old parts improved in overhaul; (ii) old parts not improved in overhaul; and (iii) no overhaul. A system dynamics supply chain model including financial performance metrics is developed to investigate these scenarios through simulation. It is shown that all three scenarios reduce total lifecycle costs and that these reductions can be very significant. The first overhaul scenario is shown to have the greatest returns but the third scenario is only slightly lower. All scenarios are shown to have diminishing investment returns and share a common level of investment that maximizes the percentage reduction in lifecycle costs. This research was performed at the University of Alabama in Huntsville
机译：在高位准备状态下维护军用飞机需要不停地流动备件。这些零件可以是来自来自大修的采购或修理部件的新零件。这些替代部件的成本是总生命周期运营和可持续费用的主要组成部分。可靠性的提高可能会降低去除和这些持续成本。整体成本降低取决于新改进部分成本的随时间相互作用，可靠性增加，不断变化的需求水平和大修的作用。为改善可靠性的情况检查了三种大修场景：（i）旧部件改进了大修; （ii）改革没有改善的旧部件; （iii）没有大修。开发了一种包括财务性能指标的系统动态供应链模型来调查这些方案。结果表明，所有三种情况都会降低总生命周期成本，并且这些减少可能非常显着。第一个大修场景显示为最大的回报，但第三种情况仅略低。所有方案都显示投资回报率递减，并分享常见的投资水平，以最大化生命周期成本降低的百分比。这项研究在阿拉巴马大学亨茨维尔进行了

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