The Location-or-routing Problem Okan Arslan

We also describe lower bounds derived from a set-partitioning based formulation (SP ) of the problem, and computed using two efficient dual ascent heuristics that use two new

In this paper we have proposed a metaheuristic method, called Backtracking Adaptive Threshold Accepting (BATA) for solving the Open Vehicle Routing Prob- lem (OVRP).. The OVRP is

— In Section 2 of this paper the optimality conditions for the EMFL (Euclidean Multi- Facility Location) minisum problem are shown to be a useful tool for finding the

Let g tj = 1 or 0 depending on whether customer x t is an element of S, or not respectively, and let C (Sj ) be the cost of the TSP solution through the set of customers in

In this section we define and analyze the accessibility index and the mean normalized transportation cost. A number of experimental results are reported to support this analysis.

Concerning instead the combination of location and routing solutions of the two echelons, each time a change of the demand assigned to a set of open secondary facilities occurs and

The common scheme on which all the heuristics are based consists in, after having found an initial solution, applying a local search phase, followed by a diversification; if the

In this paper we present an exact algorithm for the Capacitated Location- Routing Problem (CLRP) based on column and cut generation.. The CLRP is formulated as