IIE Transactions
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An Integrated Model for an Industrial Production–Distribution Problem
IIE Transactions - Tập 33 - Trang 705-715 - 2001
In this paper, we are interested in a multi-facility, multi-product and multi-period industrial problem. In this problem, both production and distribution costs are significant and they are inter-related. Therefore they should be considered simultaneously in a cost optimization problem. We model this combined production–distribution problem in the form of a network flow problem with relatively few......
Multi-shuttle automated storage/retrieval systems
IIE Transactions - Tập 29 - Trang 925-938 - 1997
Multi-shuttle automated storage/retrieval systems have been developed for use in factories and distribution centers because they are more efficient than single-shuttle systems (owing to less empty travel). This improved efficiency results in more agile support (flexible response, less waiting time, etc.) for the production system the storage/retrieval system serves. In this paper we develop analyt......
Using Tocher's curve to convert subjective quantile-estimates into a probability distribution function
IIE Transactions - - 1999
One standard approach for estimating a subjective distribution is to elicit subjective quantiles from a human expert. However, most decision-making models require a random variable's moments and/or distribution function instead of its quantiles. In the literature little attention has been given to the problem of converting a given set of subjective quantiles into moments and/or a distribution func......
Optimal allocation of resources in a job shop environment
IIE Transactions - - 1999
In this paper we study the allocation of production services (e.g., maintenance) to machining centers in a job shop when there is a limited amount of resources for such services. Different classes of jobs go through the shop. A job class is characterized by its route, its processing requirements, and its priority. The problem we address is how to optimally allocate production services (the resourc......
The dynamic T 2 chart for monitoring feedback-controlled processes
IIE Transactions - Tập 34 - Trang 1043-1053 - 2002
As manufacturing quality has become a decisive factor in global market competition, statistical quality techniques such as Statistical Process Control (SPC) are widely used in industry. With advances in information, sensing, and data collection technology, large volumes of data are routinely available in processes employing Automatic Process Control (APC) and Engineering Process Control (EPC). Alt......
A mathematical model and a heuristic procedure for the robust design problem with high-low tolerances
IIE Transactions - Tập 33 - Trang 1121-1127 - 2001
We introduce the concept of robust design in the context of high-low tolerancing and propose a mathematical programming model for it. In situations where the transfer function is available either in closed form or through computer simulation, this model can be solved using conventional non-linear programming techniques. We also introduce an approximation procedure for solving this problem experime......
Intelligent agent modeling of an industrial warehousing problem
IIE Transactions - Tập 34 - Trang 601-612 - 2002
In this paper, we consider an actual industrial warehouse order picking problem where goods are stored at multiple locations and the pick location of goods can be selected dynamically in near real time. We solve the problem using an intelligent agent-based model. The modeling framework is between the two extremes of hierarchical and heterarchical frameworks. It recognizes that horizontal as well a......
Single operation earliness–tardiness scheduling with machine activation costs
IIE Transactions - Tập 34 - Trang 509-513 - 2002
We consider a static, single operation, non-pre-emptive, deterministic scheduling problem in which a set of n jobs is to be processed on k identical machines. Jobs assigned to each machine have a common due date. The number of machines (k) is unknown. Activating a machine will require additional costs to be incurred. The objective is to find an optimal sequence, the optimal number of machines (k),......
An implicit enumeration approach to tolerance allocation in sequential tolerance control
IIE Transactions - Tập 31 - Trang 75-84 - 1999
The accuracy and precision of a manufactured dimension is largely dependent on the accuracy and precision of the technological processes selected for its execution. It is not unusual to have available several competing technological processes for execution of each manufacturing operation specified in a process plan, where it is generally assumed that as the precision of the technological process i......
Partial least square-based model predictive control for large-scale manufacturing processes
IIE Transactions - Tập 34 - Trang 881-890 - 2002
The Model Predictive Control (MPC) method has been widely adopted as a useful tool to keep quality on target in manufacturing processes. However, the conventional MPC methods are inadequate for large-scale manufacturing processes particularly in the presence of disturbances. The goal of this paper is to propose a Partial Least Square (PLS)-based MPC methodology to accommodate the characteristics o......
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