Computers and Operations Research
Solving Lot-Sizing Problems on Parallel Identical Machines Using Symmetry-Breaking Constraints
INFORMS Journal on Computing
Computers and Operations Research
Proceedings of the 2010 ACM Symposium on Applied Computing
Computers and Industrial Engineering
Simultaneous batch splitting and scheduling on identical parallel production lines
Information Sciences: an International Journal
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Industrial lotsizing and scheduling pose very difficult analytical problems. We propose an unconventional model that deals with sequence-dependent setup costs in a multiple-machine environment. The sequence-splitting model splits an entire schedule into subsequences, leading to tractable subproblems. An optimization approach based on a column generation/branch and bound methodology is developed, and heuristically adapted to test problems including five real-world problem instances gathered from industry.