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Inventory grouping and sensitivity analysis in multi-echelon spare part provisioning systems

机译:多级备件供应系统中的库存分组和敏感性分析

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Existing research in the area of multi-echelon spare part models have not adequately addressed how to take advantage of the useful concept of inventory segmentation. To fill this gap, we define a new formulation of the multi-echelon repairable parts stocking model for the purpose of finding the best inventory grouping solution. For solving this mixed-integer and nonlinear formulation, we develop a heuristic optimization model based on a greedy approach, which uses the idea that the items having more similar stocking policies should tend to group together. Our findings show that the proposed model provides a near optimal solution, which significantly outperforms the alternative classification and clustering methods in the field. In addition, we highlight the managerial implication of segmentation for problem size reduction, when managers need to perform an extensive sensitivity analysis under time limitations.
机译:在多级备件模型领域中的现有研究尚未充分解决如何利用库存细分的有用概念。为了填补这一空白,我们定义了一种多级可维修零件库存模型的新公式,目的是寻找最佳的库存分组解决方案。为了解决这种混合整数和非线性公式,我们开发了一种基于贪婪方法的启发式优化模型,该模型使用一种想法,即库存策略更相似的物品应倾向于组合在一起。我们的发现表明,所提出的模型提供了接近最佳的解决方案,其性能明显优于该领域中的替代分类和聚类方法。此外,当经理需要在时间限制下进行广泛的敏感性分析时,我们强调了细分对减少问题规模的管理意义。

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