Analyzing a Family of Formulations for Cyclic Crew Rostering.
2020
textabstractIn this paper, we analyze a family of formulations for the Cyclic Crew Rostering
Problem (CCRP), in which a cyclic roster has to be constructed for a group of employees.
We derive analytical results regarding the relative strength of the different
formulations, which can serve as a guideline for formulating a given problem instance.
Furthermore, we propose a column generation approach, which we use to develop an
exact Branch-and-Price method, and a heuristic which aims at exploiting the information
obtained from the linear relaxation. We conclude by applying our proposed
solution method to practical instances from Netherlands Railways. In particular, we
show that the computation time depends heavily on the selected formulation, and
that the column generation approach outperforms a commercial solver on hard instances.
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