Mathematical Programming Models for Solving Unequal-Sized Facilities Layout Problems - a Generic Search Method

 This paper present unequal-sized facilities layout solutions generated by a genetic search program named LADEGA (Layout Design using a Genetic Algorithm). The generalized quadratic assignment problem requiring pre-determined distance and material flow matrices as the input data and the continuous plane model employing a dynamic distance measure and a material flow matrix are discussed. Computational results on test problems are reported as compared with those of layout solutions generated by the branch and bound algorithm, a hybrid method merging simulated annealing and local search techniques and an optimization process of an enveloped block.