An improved general procedure for lexicographic bottleneck problems

  • Authors:
  • Federico Della Croce;Vangelis Th. Paschos;Alexis Tsoukias

  • Affiliations:
  • D.A.I., Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy;LAMSADE, Université Paris Dauphine, Place du Maréchal De Lattre de Tassigny, E-75775 Paris Cedex 16, France;LAMSADE, Université Paris Dauphine, Place du Maréchal De Lattre de Tassigny, E-75775 Paris Cedex 16, France

  • Venue:
  • Operations Research Letters
  • Year:
  • 1999

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Abstract

In combinatorial optimization, the bottleneck (or minmax) problems are those problems where the objective is to find a feasible solution such that its largest cost coefficient elements have minimum cost. Here we consider a generalization of these problems, where under a lexicographic rule we want to minimize the cost also of the second largest cost coefficient elements, then of the third largest cost coefficients, and so on. We propose a general rule which leads, given the considered problem, to a vectorial version of the solution procedure for the underlying sum optimization (minsum) problem. This vectorial procedure increases by a factor of k (where k is the number of different cost coefficients) the complexity of the corresponding sum optimization problem solution procedure.