id: 00849226 dt: j an: 00849226 au: Osman, Ibrahim H. ti: Heuristics for the generalised assignment problem: Simulated annealing and tabu search approaches. so: OR Spektrum 17, No.4, 211-225 (1995). py: 1995 pu: Springer-Verlag, Berlin la: EN cc: ut: generalized assignment problem; minimum cost assignment; review of exact and heuristic methods; $λ$-generation mechanism; simulated annealing; tabu search; branch-and-bound tree search; set partitioning ci: li: doi:10.1007/BF01720977 ab: Summary: The generalized assignment problem (GAP) is the problem of finding a minimum cost assignment of a set of jobs to a set of agents. Each job is assigned to exactly one agent. The total demands of all jobs assigned to any agent can not exceed the total resources available to that agent. A review of exact and heuristic methods is presented. A $λ$-generation mechanism is introduced. Different search strategies and parameter settings are investigated for the $λ$-generation descent, hybrid simulated annealing/tabu search and tabu search heuristic methods. The developed methods incorporate a number of features that have proven useful for obtaining optimal and near optimal solutions. The effectiveness of our approaches is established by comparing their performance in terms of solution quality and computational requirements to other specialized branch-and-bound tree search, simulated annealing and set partitioning heuristics on a set of standard problems from the literature. rv: