ISSN:1059-1478    

DOI:10.1111/j.1937-5956.1993.tb00100.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

In this paper, I investigate the impact of the conformance quality of a durable product on manufacturer's and user's replacement costs while the product is under warranty. I first relate conformance quality to reliability and then examine its effects on warranty costs to manufacturer and customer under both pro‐rata and free‐replacement warranties. In particular, I show that the reduction in customer's cost is generally contingent on more stringent quality improvement than the reduction in manufacturer's costs. I also discuss the value of inspection, and I present an application based on real d

ISSN:1059-1478    

DOI:10.1111/j.1937-5956.1993.tb00101.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

In this paper, we solve common due‐window scheduling problems within the just‐in‐time window concept, i.e., scheduling problems including both earliness and tardiness penalties. We assume that jobs share the same due window and incur no penalty as long as they are completed within the due window. We further assume that the earliness and tardiness penalty factors are constant and that the size of the window is a given parameter.For cases where the location of the due window is a decision variable, we provide a polynomial algorithm with complexityO(n* log (n)) to solve the problem. For cases where the location of the due window is a given parameter, we use dynamic programming with pseudopolynomial complexity to solve the pr

ISSN:1059-1478    

DOI:10.1111/j.1937-5956.1993.tb00102.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

In assembly plants, random line stoppages cause production variability. For analytic tractability and data availability, researchers commonly assume that the production process possesses the independent increments property (necessary for a process to be Poisson). If the production process has independent increments, then the production in any interval is independent of the production in any other nonoverlapping interval. This property means, for one thing, that the current period's production is never influenced by previous production periods. Intuition, however, suggests that current production could be correlated to past production‐violating this assumption of independence. If production problems persist from one period to the next, then one would expect the production in adjacent time periods to be correlated. Although the independent increments property is oflen assumed, its validity has not been demonstrated in practice. We analyze data from an automotive assembly plant to assess the validity of the independent increments assumption for its productio

ISSN:1059-1478    

DOI:10.1111/j.1937-5956.1993.tb00103.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY

摘要:

We address a medium‐ to short‐term production planning problem in a flexible manufacturing environment. First we present a single‐machine, mixed integer programming model for part type selection and lot‐sizing problems over a T‐period planning horizon. Demand for part types changes dynamically through the periods. The objective is to meet the demand for part types during the periods they are demanded. Available machine time and tool magazine capacities are the system constraints in our models. We next extend on the single‐ machine model to include multiple machines. In addition to part type selection and lotsizing decisions, the extended model also addresses the machine‐loading decision. We present exact branch and bound procedures based on linear programming relaxations for the two models. We also report the results of our computationa

ISSN:1059-1478    

DOI:10.1111/j.1937-5956.1993.tb00104.x

出版商:Blackwell Publishing Ltd    

年代:1993

数据来源: WILEY