| Article ID: | iaor1994895 |
| Country: | United States |
| Volume: | 39 |
| Issue: | 8 |
| Start Page Number: | 975 |
| End Page Number: | 988 |
| Publication Date: | Aug 1993 |
| Journal: | Management Science |
| Authors: | Duenyas Izak, Hopp Wallace, Spearman Mark |
| Keywords: | service, networks, queues: theory |
The authors model a CONWIP (CONstant Work-in-Process) production line with deterministic processing times and exponential failure and repair times as a closed queueing network. They derive an approximation for the mean and variance of the output during a specified interval and give computable conditions under which this approximation performs well. The authors show through empirical tests that the approximation is robust and illustrate its usefulness as the basis for a procedure for selecting an economic production quota and a card count for a CONWIP line.