A Framework for Constraint Programming Based Column Generation
نویسندگان
چکیده
Column generation is a state of the art method for optimally solving di cult large scale optimization problems such as airline crew as signment We show how to apply column generation even if those prob lems have complex constraints that are beyond the scope of pure OR methods We achieve this by formulating the subproblem as a constraint satisfaction problem CSP We also show how to e ciently treat the special case of shortest path problems by introducing an e cient path constraint that exploits dual values from the master problem to exclude nodes that will not lead to paths with negative reduced costs We demon strate that this propagation signi cantly reduces the time needed to solve crew assignment problems
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تاریخ انتشار 1999