Mathematical Programming

, Volume 98, Issue 1–3, pp 253–280 | Cite as

Parallel branch, cut, and price for large-scale discrete optimization

  • T.K. Ralphs
  • L. Ladányi
  • M.J. Saltzman


In discrete optimization, most exact solution approaches are based on branch and bound, which is conceptually easy to parallelize in its simplest forms. More sophisticated variants, such as the so-called branch, cut, and price algorithms, are more difficult to parallelize because of the need to share large amounts of knowledge discovered during the search process. In the first part of the paper, we survey the issues involved in parallelizing such algorithms. We then review the implementation of SYMPHONY and COIN/BCP, two existing frameworks for implementing parallel branch, cut, and price. These frameworks have limited scalability, but are effective on small numbers of processors. Finally, we briefly describe our next-generation framework, which improves scalability and further abstracts many of the notions inherent in parallel BCP, making it possible to implement and parallelize more general classes of algorithms.


integer programming discrete optimization parallel algorithm branch and bound branch and cut branch and price branch, cut, and price 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  1. 1.Department of Industrial and Systems EngineeringLehigh UniversityBethlehem
  2. 2.Department of Mathematical SciencesIBM T. J. Watson Research CenterYorktown Heights
  3. 3.Department of Mathematical SciencesClemson UniversityClemson

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