Article ID: | iaor20108248 |
Volume: | 38 |
Issue: | 6 |
Start Page Number: | 931 |
End Page Number: | 941 |
Publication Date: | Jun 2011 |
Journal: | Computers and Operations Research |
Authors: | Prins Christian, Benavent Enrique, Prodhon Caroline, Belenguer Jos-Manuel, Wolfler Calvo Roberto |
Keywords: | location, vehicle routing & scheduling |
Recent researches in the design of logistic networks have shown that the overall distribution cost may be excessive if routing decisions are ignored when locating depots. The Location-Routing Problem (LRP) overcomes this drawback by simultaneously tackling location and routing decisions. The aim of this paper is to propose an exact approach based on a Branch-and-Cut algorithm for solving the LRP with capacity constraints on depots and vehicles. The proposed method is based on a zero-one linear model strengthened by new families of valid inequalities. The computational evaluation on three sets of instances (34 instances in total), with 5‐10 potential depots and 20‐88 customers, shows that 26 instances with five depots are solved to optimality, including all instances with up to 40 customers and three with 50 customers.