A Primal-Dual Approximation Algorithm for the k-Level Stochastic Facility Location Problem

  • Zhen Wang
  • Donglei Du
  • Dachuan Xu
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6124)


We present a combinatorial primal-dual 7-approximation algorithm for the k-level stochastic facility location problem, the stochastic counterpart of the standard k-level facility location problem. This approximation ratio is slightly worse than that of the primal-dual 6-approximation for the standard k-level facility location problem [3] because of the extra stochastic assumption. This new result complements the recent non-combinatorial 3-approximation algorithm for the same problem by Wang et al [21].


Facility location Approximation algorithm Primal-dual 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Zhen Wang
    • 1
  • Donglei Du
    • 2
  • Dachuan Xu
    • 1
  1. 1.Department of Applied MathematicsBeijing University of TechnologyBeijingP.R. China
  2. 2.Faculty of Business AdministrationUniversity of New BrunswickFrederictonCanada

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