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Scheduling jobs with release dates and tails on two unrelated parallel machines to minimize the makespan. (English) Zbl 0953.90029
Summary: This paper deals with the problem of assigning a set of n jobs, with release dates and tails, to either one of two unrelated parallel machines and scheduling each machine so that the makespan is minimized. This problem will be denoted by R2|r i ,q i |C max . The model generalizes the problem on one machine 1|r i ,q i |C max , for which a very efficient algorithm exists. In this paper we describe a branch and bound procedure for solving the two machine problem which is partly based on Carlier’s algorithm for the 1|r i ,q i |C max . An O(nlogn) heuristic procedure for generating feasible solutions is given. Computational results are reported.
90B35Scheduling theory, deterministic
90C57Polyhedral combinatorics, branch-and-bound, branch-and-cut
68M20Performance evaluation of computer systems; queueing; scheduling