Showing papers in "Computers & Industrial Engineering in 1990"

TL;DR: In this paper, the authors analyze the nine OPT rules, the OPT concepts and OPT philosophy in order to establish an analytical, theoretical basis for the OPT system based on systems theory concepts, mathematical programming theory and techniques, as well as queuing theory, the Pareto rule, and the Japanese production experience.

TL;DR: In this article, the use of a regression metamodel to conduct sensitivity analysis, application in optimizing manufacturing systems, and the validity of the model are illustrated, and an example is given with a maintenance float problem.

TL;DR: An expert system framework for the control of an automated storage and retrieval system (AS/RS) is presented which uses a hierarchical control structure which partitions the AS/RS control decision process into strategic, tactical, and process control levels, and employs a multipass simulation technique to tactically adapt control policies to system changes.

TL;DR: An efficient heuristic is developed based on the fact that there is a feasible cycle time at which the expected total cost becomes a minimum, and provides an optimal task assignment with such a cycle time.

TL;DR: In this article, an economic order quantity (EOQ) model that integrates product pricing and order sizing decisions to maximize profit is presented, where the Kuhn-Tucker conditions are used to determine the optimal solution under conditions of storage space and inventory investment limitations.

TL;DR: A new framework for obtaining analytic expressions of the expected throughput rate in Automated Storage and Retrieval Systems (AS/RSs) is presented and the potential for significant reductions in the expected cycle time is demonstrated in the case of full-turnover item allocation.

TL;DR: In this paper, the authors discuss the findings of a survey conducted for the state of the art for expert-system-based automated process planning systems and make recommendations for possible future directions in the research of a more efficient computer-aided process planning (CAPP) module.

TL;DR: This study will examine the computerized systems of Methods-Time Measurement, Modular Arrangement of Predetermined Time Standards (MODAPTS), and Maynard Operation Sequence Technique due to their popular and worldwide support.

TL;DR: In this paper, the authors extend Naddor's inventory models to deterministic systems with a linearly increasing demand over a finite planning horizon by assuming that the production rate is uniform and finite.

TL;DR: The types of nonconformities which may be detected include trace geometry, improper spacing, measles and surface nonconforming circuit boards using computer vision.

TL;DR: In this article, a two-stage group screening experimental design is used to investigate which subset of the variables is most important in explaining the optimum response variable, and a simulation of a new generation of flight simulator is analyzed to determine the values of six variables that will optimize the value of a dependent variable simultaneously.

TL;DR: This paper focuses on the fixturing of planar polyhedral workpieces for face-milling operations and predicts the feasibility of a generalized expert fixtured strategy on CAD systems.

TL;DR: In this paper, a cost model is introduced to solve for optimum maintenance float policy in closed queuing maintenance networks, where all the centers in the network are exponentially distributed and the program searches through a three-dimensional cost surface for the optimum solution.

TL;DR: In this article, the assignment of operations to machines in a flexible manufacturing system (FMS) and the impact on alternate routes through the system is studied, and a constrained network model of the machine loading problem is presented.

TL;DR: The Intelligent Front End for manufacturing systems design that generates simulation models in SIMAN, methods for automatic simulation optimization, and a PROLOG based simulation tool that allows the addition of heuristic knowledge to a simulation model as mentioned in this paper.

TL;DR: In this article, the relative performances of four popular heuristics against the Wagner-Whitin (WW) algorithm were compared and it was shown that the Silver-Meal heuristic exhibits the best overall performance, in terms of speed (17 times faster than WW), and in quality of solution (with an average loss of 1.6% of optimality).

TL;DR: In this paper, the similarity coefficient method and machine-component group analysis have been widely used to form machine cells for cellular manufacturing applications, but they do not provide satisfactory solutions in the presence of bottleneck machines.

TL;DR: In this article, the authors introduce the topic of automated visual inspection (AVI) as a subset of machine vision and present the components of a generic AVI system and current applications of AVI systems.

TL;DR: The principal (core) production management applications in which the computer could be used in smaller companies are identified and the order in which different components of a general purpose production management package should be developed is specified.

TL;DR: MOCRAFT contains a full implementation of the original CRAFT program, and is a professional quality development tool featuring full color moving bar and pull down menus, help screens, high resolution color graphics, input and output of plain ASCII files, exits to and returns from IBM DOS, and much more.

TL;DR: In this article, a closed system version of Whitt's second order approximations for GI/G/1 queues is applied to AASs with repair loops as an analytical tool for performance evaluation.

TL;DR: An inference structure is described which allows the designer of an AI-based scheduling system to take advantage of a data-driven strategy to move forward from existing knowledge to new conclusions.

TL;DR: In this article, a zero-one mixed integer programming formulation for the optimal layout/location of a robotic cell is presented, where n different rectangular part bins of fixed sizes are to be optimally located within the constrained area.

TL;DR: In this paper, the probability density function of the number of failed machines in a G/G/R machine repair system obtained through diffusion approximation is compared with some of the exact existing results.

TL;DR: A number of improving pairwise interchanges are found to generate better sequences from the shortest processing time sequence, and a solution procedure based on this result is presented.

TL;DR: In this paper, the authors investigated the statistical distributions of the output intervals for lines of different lengths and buffer sizes; the station processing times are allowed to assume a wide variety of realistic shapes.

TL;DR: In this paper, a set of knowledge-based methods for increasing the overall effectiveness of existing decision aids for line balancing is proposed, including the development of the precedence network diagram, the selection of a suitable job allocation algorithm, and the implementation of the job allocation solution.

TL;DR: In this article, an integrated performance-reliability model is proposed to evaluate different measures for a more complete and easy quantification of the fault tolerance characteristic of a flexible automated production system and its ability to perform in degraded states.

TL;DR: In this article, Anderson and Moodie provide models for optimizing interstation buffer capacities for short production lines and refines and extends their results in two important dimensions: (a) for lengthier systems and (b) for generally-distributed workstation processing times.

TL;DR: A framework for the efficient scheduling of jobs considering multiple conflicting objectives of the jobshop, in which a set of machines is used to process a stream of jobs arriving randomly.