Bi-objective branch-and-cut algorithms based on LP relaxation and bound sets

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

426 Downloads (Pure)


Most real-world optimization problems are multi-objective by nature, with conflicting and incomparable objectives. Solving a multi-objective optimization problem requires a method that can generate all rational compromises between the objectives. This paper proposes two distinct bound set-based branch-and-cut algorithms for general bi-objective combinatorial optimization problems based on implicit and explicit lower-bound sets. The algorithm based on explicit lower-bound sets computes, for each branching node, a lower-bound set and compares it with an upper-bound set. The other fathoms branching nodes by generating a single point on the lower-bound set for each local nadir point. We outline several approaches for fathoming branching nodes, and we propose an updating scheme for the lower-bound sets that prevents us from solving the bi-objective linear programming relaxation of each branching node. To strengthen the lower-bound sets, we propose a bi-objective cutting-plane algorithm that adjusts the weights of the objective functions such that different parts of the feasible set are strengthened by cutting planes. in addition, we suggest an extension of the branching strategy "Pareto branching." We prove the effectiveness of the algorithms through extensive computational results.

Translated title of the contributionBi-objective branch-and-cut algorithms based on LP relaxation and bound sets
Original languageEnglish
JournalINFORMS Journal on Computing
Pages (from-to)790-804
Number of pages15
Publication statusPublished - 2019


  • bi-objective branch-and-cut
  • bi-objective optimization
  • branch-and-cut
  • combinatorial optimization


Dive into the research topics of 'Bi-objective branch-and-cut algorithms based on LP relaxation and bound sets'. Together they form a unique fingerprint.

Cite this