Abstract
We consider the problem of planning the shunting of train units at a railway workshop area. Before and after the maintenance check, a train unit is parked at a depository track. The problem is to schedule the trains to workshops and depot tracks in order to complete the repairs as soon as possible, while avoiding train blockings at the tracks. We give a formal definition of the problem and present three heuristic approaches based on, respectively, Guided Local Search (GLS), Guided Fast Local Search (GFLS) and Simulated Annealing (SA). Computational experiments are reported for realistic instances. It turns out, that both GLS and SA find within a few minutes solutions that are a few percent from the best MIP solution found.
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