RHS in simplex method

Answered

Cong Jin

• August 15, 2024 08:12

Hello. My question is how can I get the Δb mentioned in the figure below? Is there any related attribute in GUROBI that can be used to find Δb?

Related to

• Sensitivity

0

• 

  Matthias Miltenberger

  Gurobi Staff

  • August 15, 2024 08:34
  • Edited

  Hi,

  You can get the min and max values for \(\Delta b\) by querying these two linear constraint attributes after the model has been solved to optimality and a basic solution is available:

  • SARHSLow
  • SARHSUp

  "SA" stands for sensitivity analysis, and these values show how much you can change the RHS without losing the optimality of that basis. The same exists for variable bounds and objective coefficients (see here and following).

  Cheers,
  Matthias

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• 

  Cong Jin

  • August 15, 2024 10:19

  

  

  Hello,

  Thank you very much for your help and solving the problem that has been bothering me for half a month. Thank you very much!

  Best Wishes!

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