Cannot find feasible solution

Answered

Jessica Verhoijsen

• April 29, 2020 09:47

My optimization model cannot find a feasible solution in a reasonable time. Which settings should I change to make this faster? My output only finds a feasible solution after 39049 seconds. The best bound starts low and does not increase fast.

 

 

Here in between are 500 other lines.

 

0

• Official comment

  

  Simranjit Kaur

  Gurobi Staff

  • December 06, 2024 00:47

  This post is more than three 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 why not try our AI Gurobot?.
• 

  Jaromił Najman

  Gurobi Staff

  • August 04, 2020 12:07
  • Edited

  Hi,

  In order to improve the feasible solution finding process you could start by setting the MIPFocus parameter to 1. You could also try one of the following three: ImproveStartNodes, ImproveStartGap, and ImproveStartTime. You could also experiment with the Presolve and Cuts parameters. If possible, you could provide a (partial) starting solution.

  We also have a knowledge base article on important parameters for MIP models.

  Please let us know if one of the above was helpful.

  Best regards,
  Jaromił

  0

Post is closed for comments.