Reducing temporal delays in a real time train management system

We report results on a combined scheduling and resource allocation problem in transportation. The problem occurs in a real time management system for vehicles when it is disturbed by introducing unplanned service tasks and temporal delays of the transportation and service tasks. A method to solve the the problem using a constraint programming model is described in some detail. Preliminary test runs of the solver on problem sets generated by a simulator taking statistic models of the wear of the vehicle components into account are also reported.