This paper reports the results of a joint project with a large railway company in Germany to build a decision support system for analyzing the consequences of timetable changes, modifications of break and working time regulations as well as changes in the cost structure on future crew needs. For that purpose we have developed a mathematical model of the underlying crew scheduling problem that respects all the organizational and technical constraints as well as labor regulations. We have implemented a Branch&Price based optimization system that is used to perform scenario analyses of future crew needs using medium-term timetable drafts as input data.Keywords Railway crew scheduling · Break and working time regulations · Branch and price · Decision support system
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