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Type: Artigo de periódico
Title: Improved bounds for the traveling umpire problem: A stronger formulation and a relax-and-fix heuristic
Author: de Oliveira, L
de Souza, CC
Yunes, T
Abstract: Given a double round-robin tournament, the traveling umpire problem (TUP) consists of determining which games will be handled by each one of several umpire crews during the tournament. The objective is to minimize the total distance traveled by the umpires, while respecting constraints that include visiting every team at home, and not seeing a team or venue too often. We strengthen a known integer programming formulation for the TUP and use it to implement a relax-and-fix heuristic that improves the quality of 24 out of 25 best-known feasible solutions to instances in the TUP benchmark. We also improve all best-known lower bounds for those instances and, for the first time, provide lower bounds for instances with more than 16 teams. (c) 2013 Elsevier B.V. All rights reserved.
Subject: OR in sports
Integer programming
Traveling umpire problem
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.ejor.2013.12.019
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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