The stochastic joint replenishment problem: A new policy, analysis, and insights

The stochastic joint replenishment problem: A new policy, analysis, and insights

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Article ID: iaor20072729
Country: United States
Volume: 53
Issue: 6
Start Page Number: 525
End Page Number: 546
Publication Date: Sep 2006
Journal: Naval Research Logistics
Authors: , ,
Abstract:

In this study, we propose a new parsimonious policy for the stochastic joint replenishment problem in a single-location, N-item setting. The replenishment decisions are based on both group reorder point-group order quantity and the time since the last decision epoch. We derive the expressions for the key operating characteristics of the inventory system for both unit and compound Poisson demands. In a comprehensive numerical study, we compare the performance of the proposed policy with that of existing ones over a standard test bed. Our numerical results indicate that the proposed policy dominates the existing ones in 100 of 139 instances with comparably significant savings for unit demands. With batch demands, the savings increase as the stochasticity of demand size gets larger. We also observe that it performs well in environments with low demand diversity across items. The inventory system herein also models a two-echelon setting with a single item, multiple retailers, and cross docking at the upper echelon.

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