In this paper we consider perishable inventory systems with two types of demand. Demand may be for either fresh items or for somewhat older items. We model the system with two inventory stages. The first stage holds fresh items and the second stage holds the older items. We approximate the...

This paper considers the problem of test design and implementation when testing is imperfect. Items that are classified as conforming may be nonconforming, resulting in a poor outgoing quality level. Items that are classified as nonconforming may be conforming, resulting in excessive scrapping...

We study single-server stations in tandem, in which customers arrive according to a Poisson Process and are to be served at each of two servers. The order of the stations is assumed not to affect the quality of the service customers obtain. Using a light traffic approximation, we select (for...