In this paper we address the traveling purchaser problem, an NP-hard problem that generalizes the traveling salesman problem. We present several metaheuristics that combine genetic algorithms and local search. The genetic algorithms are induced by different hierarchic orderings of the decision making regarding the route and the acquisition of the items. Computational experiments were carried out with benchmark instances and the results show that the proposed metaheuristics are a suitable tool to solve high-dimensioned instances for which the exact methods do not provide solutions within a reasonable CPU time. For several instances, best new upper bounds for the optimum value of the objective function were obtained.Keywords: traveling purchaser problem; genetic algorithms; local search; metaheuristics; biased random key genetic algorithm r starts and ends at the depot; r contains a subset of markets, which covers the list of items; r minimizes the total cost, which is the sum of the traveling cost and the purchasing cost.Apart from the most common application of the TPP in vehicle routing, there are several other applications such as warehousing problems or production scheduling problems (see, e.g., Singh and van Oudheusden
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.