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1.
Candace Arai Yano Senior Member IIE Robert C. Carlson Senior Member Iie 《IIE Transactions》1985,17(4):370-377
Results of a simulation study of the economics of frequency of rescheduling Material Requirements Planning (MRP) systems are presented for a single-product, two-stage system in which demand is uncertain. The results indicate that for systems with moderate demand uncertainty, frequent rescheduling to maintain customer service may be uneconomical when compared with the alternative of more stable schedules in conjunction with safety stock. This result arises primarily because the cost of “emergency” production setups which occur when rescheduling is frequent exceeds the cost of safety stock required to “protect” stable schedules. 相似文献
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This note describes a method for measurement of isokinetic strength for prediction of manual materials handling capacity of individuals. The apparatus used in this methodology and measurement technique are illustrated in detail. 相似文献
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In this paper is presented a class of stochastic signals and of correlation matrices introducing very fast algorithms for solving linear problems. These signals are derived from white noise by using three kinds of operations combined in various orders: summation, difference and instantaneous modulation. The discrete time Brownian motion is a particular example of such signals. 相似文献
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A. Weinmann ÖVE Senior Member IEEE 《e & i Elektrotechnik und Informationstechnik》2000,117(12):785-788
The method of softly assigning eigenvalues is attractive for design problems where constraining the control effort and disturbance feedforward is more important than following the exact pole location. 相似文献
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Walter S. Snyder Member IIE James W. Chrissis Senior Member IIE 《IIE Transactions》1990,22(2):161-167
This paper presents an algorithm for solving large-scale polynomial (nonlinear) zero-one programming problems. The procedure incorporates a mixture of pseudo-Boolean concepts and time-proven implicit enumeration procedures. Significant savings in the time required to obtain optimal solutions results from the use of a minimum cover to analyze the future effect of a particular implicit enumeration iteration. Additional improvement is obtained through the use of a term ranking strategy to control the arborization of the implicit enumeration process. Computational experience demonstrates that this algorithm can reduce the magnitude of the computer solution time for large problems from several minutes to a matter of a few seconds. 相似文献
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Bernard C. Jung Senior Member IIE J. T. Black Senior Member IIE David W. H. Chen James N. Hool Senior Member IIE 《IIE Transactions》1991,23(2):169-184
Taguchi-based methodology is implemented to determine and to optimize a robot's process capability (RPC). This low-cost solution optimizes a robot's operational conditions. The experiment determines the RPC (i.e., accuracy, repeatability, reproducibility and stability) and considers seven operational factors (i.e., load, speed, distance, orientation, direction, height, and starting point) with three levels each. The results from Taguchi experimental design and data analysis show that the various factors affect each RPC characteristic differently. Therefore, an optimized combination of operational factors for each RPC characteristic is determined separately. Based on the project results, recommendations are made to use Taguchi Methods. Test results and future research needs are also discussed 相似文献
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