Spare parts management considering new sales

H. Liao, Peng Wang, T. Jin, S. Repaka
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引用次数: 8

Abstract

It is difficult to control spare parts inventory of a product to meet certain maintenance demand. The problem becomes more challenging when the installed base of the product changes over time. Under this situation, the inventory value needs to be adjusted according to the resulting non-stationary maintenance demand. This challenge is usually encountered when a manufacturer starts selling a new product and agrees to provide spare parts for maintenance. In this paper, a special case involving a new non-repairable product with a single spare pool is considered. It is assumed that the rate of new sales of the product is constant, and the product's failure time follows the Weibull distribution. The mathematical model for the resulting maintenance demand is formulated and calculated through simulation. Based on the maintenance demand, a dynamic (Q, r) - (lotsize/reorder-point) restocking policy is formulated and solved using a multi-resolution approach. Finally, a numerical example with the objective of minimizing the inventory cost under a service level constraint is provided to demonstrate the proposed methodology in practical use.
备件管理,考虑新销售
控制一个产品的备件库存以满足一定的维修需求是很困难的。当产品的安装基础随着时间的推移而变化时,这个问题变得更加具有挑战性。在这种情况下,库存值需要根据由此产生的非平稳维修需求进行调整。当制造商开始销售新产品并同意提供维修备件时,通常会遇到这种挑战。本文考虑了一种特殊情况,即新的不可修复产品只有一个备用池。假设产品的新销售量恒定,产品的失效时间服从威布尔分布。通过仿真,建立了维修需求的数学模型并进行了计算。基于维修需求,制定了动态(Q, r) -(批量/再订货点)补货策略,并采用多分辨率方法求解。最后,以服务水平约束下库存成本最小化为目标,给出了一个数值示例,以验证所提方法的实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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