We develop an Optimized Queueing Network (OQNet) capacity planning tool for supporting the design of new and reconfigured semiconductor fabrication facilities that makes use of queueing network approximations and an optimization routine. The basic problem addressed by this tool is to minimize the facility cost required to meet specified volume and cycle time targets. Features common to semiconductor environments, such as batch processes, re-entrant flows, multiple product classes, and machine setups, are incorporated into the model. Comparisons with simulation show that the queueing and other approximations are reasonably accurate. Tests of the optimization routine demonstrate that it can find good solutions quickly.
|Original language||English (US)|
|Number of pages||12|
|Journal||IIE Transactions (Institute of Industrial Engineers)|
|State||Published - Feb 2002|
Bibliographical noteFunding Information:
This work was supported in part by National Science Foundation Grant DMI-9322830 and a grant from Motorola, Inc.