Exact Solutions to the Double Travelling Salesman Problem with Multiple Stacks

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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In this paper we present mathematical programming formulations and solution approaches for the optimal solution of the Double Travelling Salesman Problem with Multiple Stacks (DTSPMS). A set of orders is given, each one requiring transportation of one item from a customer in a pickup region to a customer in a delivery region. The vehicle available for the transportation in each region carries a container. The container is organized in rows of given length. Each row is handled independently from the others according to a LIFO (Last In First Out) stack policy. The DTSPMS problem consists of determining the pickup tour, the loading plan of the container and the delivery tour in such a way that the total length of the two tours is minimized. The formulations are based on different modelling ideas and each formulation gives rise to a specific solution approach. We present computational results on a set of benchmark instances that compare the different approaches and show that the most successful one is a decomposition approach applied to a new model.
Original languageEnglish
JournalNetworks
Publication date2010
Volume56
Issue4
Pages229-243
ISSN0028-3045
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 12

Keywords

  • pickup and delivery, travelling salesman problem, loading, LIFO, branch and cut
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