In many practical applications or multi-item inventory systems significant economies of scale can be exploited when coordinating replenishment orders for groups of items. This paper considers a continuous review multi-item inventory system with compound Poisson demand processes; excess demands...

This paper establishes a rather complete optimality theory for the average cost semi-Markov decision model with a denumerable state space, compact metric action sets and unbounded one-step costs for the case where the underlying Markov chains have a single ergotic set. Under a condition which,...

In diesem Band werden zentrale Themen und neuere Entwicklungstendenzen auf dem Gebiet des Operations Research (OR) behandelt. Gegenstand sind die Vorträge, die anläßlich der 22. Jahrestagung der Deutschen Gesellschaft für Operations Research (DGOR) und der Nederlandse Stichting voor...

We consider a production-inventory control model of finite capacity, in which backordering up to a certain level is allowed. We assume that there exist two possible production rates. The control is based on two critical stock-levels and prescribes to change the production rate used only when one...