Article ID: | iaor2007170 |
Country: | United States |
Volume: | 17 |
Issue: | 3 |
Start Page Number: | 305 |
End Page Number: | 320 |
Publication Date: | Jun 2005 |
Journal: | INFORMS Journal On Computing |
Authors: | Lenstra Jan Karel, Hoogeveen Han, Hurkens Cor, Vandevelde Ann |
Keywords: | computers |
The multiprocessor flow-shop is the generalization of the flow-shop in which each machine is replaced by a set of identical machines. As finding a minimum-length schedule is NP-hard, we set out to find good lower and upper bounds. The lower bounds are based on relaxation of the capacities of all machine sets except one. This results in a parallel-machine scheduling problem with release dates and delivery times, for which we derive a number of lower bounds. We pay special attention to the time complexity of algorithms for computing these bounds. To obtain the upper bounds a constructive algorithm in subsequent stages is used. We present an experimental comparison of the various lower and upper bounds for the multiprocessor flow-shop problem.