A matheuristic approach for the split delivery vehicle routing problem: an efficient set covering-based model with guided route generation schemes Online publication date: Wed, 14-Aug-2019
by Nurul Huda Mohamed; Said Salhi; Gábor Nagy; Nurul Akmal Mohamed
International Journal of Mathematics in Operational Research (IJMOR), Vol. 15, No. 1, 2019
Abstract: The split delivery vehicle routing problem (SDVRP) is a relaxed version of the classical VRP where customers can be visited more than once. The SDVRP is also applicable for problems where one or more of the customers require a demand larger than the vehicle capacity. Constructive heuristics adapted from the parallel savings and the sweep methods are first proposed to generate a set of solutions which is then used in the new and more efficient set covering-based formulation which we put forward. An effective repair mechanism to remedy any infeasibility due to the set covering problem is presented. A reduced set of promising routes is used in our model, instead of the original set of routes, proposing and using well defined reduction schemes. This set covering-based approach is tested on large datasets from the literature with encouraging results. In brief, seven best solutions including ties are found among the 137 SDVRP instances.
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