Article ID: | iaor20022636 |
Country: | United Kingdom |
Volume: | 40 |
Issue: | 3 |
Start Page Number: | 731 |
End Page Number: | 744 |
Publication Date: | Jan 2002 |
Journal: | International Journal of Production Research |
Authors: | Lai K.K., Xue Jue, Zhang Guoqing |
Keywords: | programming: integer |
A new kind of warehouse layout problem, the multiple-level warehouse layout problem, is investigated. Both horizontal and vertical travel costs need to be considered when making a layout. In the problem, unit travel costs are item-dependent and different items can be mixed in a cell. An IP model is proposed, which is shown to be NP-hard. An effective assignment method is presented and genetic algorithm heuristics are developed. Extensive computational experiments are conducted to verify the effectiveness of the algorithms.