We address multi-item inventory systems with random and seasonally fluctuating, and possibly correlated, demands. The items are produced in two stages, each with its own lead-time; in the first stage a common intermediate product is manufactured. The production volumes in the first stage are...

In this paper we consider a transportation system consisting of a carrier with capacity Q \le \infty , operating between two terminals. Passengers arrive at these terminals according to independent Poisson processes and are transported by the carrier from one terminal to the other terminal....

We investigate the scheduling of garbage trucks in the city of Chicago. Analysis of data collected from the system shows that city blocks differ in the rate at which garbage is collected. However, in the current system, each truck visits the dumpsite two times each day. Our approach is to devise...

In this paper we introduce a new graph, the sequential decision diagram, to aid in modeling formulation, and solution of sequential decision problems under uncertainty. While as compact as an influence diagram, the sequential diagram captures the asymmetric and sequential aspects of decision...

This paper considers two firms that engage in joint production. The prospect of repeated interaction introduces dynamics, in that actions that firms take today influence the costliness and effectiveness of actions in the future. Repeated interaction also facilitates the use of informal...

In this paper we look at some aspects of infinite horizon Markov decision processes in which information regarding parameter values is restricted to a finite time horizon, and in which decisions are based upon the finite horizon data but are recomputed as we move forward in time and gain...

Most performance evaluation models in the operations management literature implicitly assume that tasks possess standardized completion criteria. However, in many systems, particularly service and professional work, judgment is frequently required to determine how much time to allocate to a...

We consider a multicomponent, single-product assemble-to-order (ATO) system that faces frequent, component-based technology innovations. For each component, there are two technologies with overlapping life cycles coexisting in the market. All cost parameters associated with each technology...

Deciding who should receive a mail-order catalog is among the most important decisions that mail-order-catalog firms must address. In practice, the current approach to the problem is invariably myopic: firms send catalogs to customers who they think are most likely to order from that catalog. In...

In this paper, we use a Markov decision process (MDP) to model the joint inventory-promotion decision problem. The state variable of the MDP represents the demand state brought about by changing environmental factors as well as promotion decisions. The demand state in a period determines the...