Affiliation: | 1. Research Group Logistics, Hasselt University, Agoralaan Gebouw D, 3590 Diepenbeek, Belgium;2. Research Foundation Flanders (FWO), Egmontstraat 5, 1000 Brussels, Belgium;3. CORMSIS Centre of Operational Research, Management Sciences and Information Systems, University of Southampton, Southampton, SO17 1BJ, UK |