Abstract
In this paper we consider an inventory management problem motivated by a specific practical context that concerns the commonly used periodic review, reorder point, order-up-to-level control system. In particular, the reorder point and order-up-to level have to be selected so as to satisfy two management-specified constraints. First, from a marketing (or, more generally, a business) perspective, the actual fill rate achieved must be no lower than a prescribed value. Second, for production or supply purposes, the average time between consecutive replenishments must be as close as possible to a target value. The demand distribution considered is the negative binomial. An efficient procedure is developed with illustrations.
Acknowledgements
We thank Daniel Costa, Head of Demand and Supply Planning, Supply Chain Management at Nestlé Suisse, for describing a practical situation that motivated the topic studied. The research leading to this paper was supported by the Natural Sciences and Engineering Research Council of Canada under grant 239153-05.