Runtime for multiple scenarios

回答済み

Vincent

2023年11月20日 17:45

• 
• 
• 

Sometimes, I encounter a situation where my model's runtime decreases when the number of scenarios slightly increases. I'd appreciate any insight into the potential reasons, as this seems counterintuitive to me. 

Thank you for your help.

関連

• Multiple Scenarios

0

• 正式なコメント

  

  Simranjit Kaur

  • Gurobi Staff

  2026年11月13日 01:34

  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.
• 

  Mario Ruthmair

  • Gurobi Staff

  2023年11月23日 17:33

  Hi Vincent,

  This is not surprising. Nowadays, most solvers suffer from high variability: Small changes in the model can lead to a different solution path in the algorithms, which may lead to very different runtimes. By chance, e.g., one of the built-in heuristics finds a solution earlier, etc. See this article for some discussion on this topic. Changing the random seed value (parameter Seed) for the same model might also lead to different runtimes.

  Best regards,
  Mario

  0
• 

  Vincent

  2023年11月25日 20:33

  • 
  • 
  • 

  Thank you Mario Ruthmair

  0

投稿コメントは受け付けていません。