The influence of service-time variability in a closed network of queues
Performance Evaluation
A new MVA-based approximation for closed queueing networks with a preemptive priority server
Performance Evaluation
Operations Research - Supplement to Operations Research: stochastic processes
Mean-Value Analysis of Closed Multichain Queuing Networks
Journal of the ACM (JACM)
AMVA techniques for high service time variability
Proceedings of the 2000 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
The MVA priority approximation
ACM Transactions on Computer Systems (TOCS)
Discrete Simulation: Fundamentals and Microcomputer Support
Discrete Simulation: Fundamentals and Microcomputer Support
Mean value analysis of re-entrant line with batch machines and multi-class jobs
Computers and Operations Research
Manufacturing Systems Modeling and Analysis
Manufacturing Systems Modeling and Analysis
OR FORUM---Little's Law as Viewed on Its 50th Anniversary
Operations Research
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Constant work-in-process control (CONWIP) by product type is a strategy for improving the cycle time in multiple product factories. For realistic sized systems, a mean-value analysis (MVA) approximation methodology yields quick and accurate results. A processing step modeling paradigm is developed for the MVA methodology and applied to multiple-product reentrant-flow sequences. A variety of sequencing rules have been proposed in an attempt to improve the mean cycle times while maintaining the product throughput rates. A general priority scheme is developed for the MVA modeling approach which allows many of the sequencing rules to be implemented and evaluated under multiple product CONWIP control. Four priority schemes (FIFO, shortest expected processing time, shortest remaining processing time, and Wein's work-balance) are illustrated for a data set from the literature. The best priority scheme, work-balance, obtained a 41% mean processing time improvement over FIFO under push control and 37% under CONWIP control.