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Best Objective Bound Does not Change

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  • 正式なコメント
    Simranjit Kaur
    • Gurobi Staff
    This post is more than two years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
  • Simranjit Kaur
    • Gurobi Staff

    Have you tried setting the MIPfocus parameter to 2 or 3? This setting encourages the solver to spend more time on improving the best bound. Other parameters to try are: Cuts  to higher values and VarBranch=3 (strong branching) 

    You may also find the subsection titled "Lack of Progress in the Best Bound" of this paper useful: Practical guidelines for solving difficult mixed integer linear programs.

    1
  • Mingze Li
    • Gurobi-versary
    • Conversationalist
    • First Question

    Simranjit,

    I have tried changing MIPfocus parameter. I will try the other parameters. Thank you for the paper!

    0

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