Ask the Expert Webinar Series

What Are the Ways to Diagnose Infeasibility?

On-Demand • Cost: Complimentary

About the webinar

Join this webinar and learn to diagnose and understand why an optimization problem is infeasible and how to make it feasible.

Perfect for SAS/OR® (SAS®9) and SAS Optimization (SAS® Viya®) users, especially those who use PROC OPTMODEL or the runOptmodel action.  

You will learn:

  • How to use the “IIS=” option.
  • How to use the network solver.
  • How to use the output of one solver as input for another solver.
  • How to modify an infeasible problem as little as possible to make it feasible.

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About the Expert


Rob Pratt,
Senior Manager, Advanced Analytics R&D, SAS

Rob Pratt has worked at SAS since 2000 and currently works in the operations research department within SAS R&D's advanced analytics division. He manages a team of developers responsible for the optimization modeling language, constraint programming, project management and discrete-event simulation.  

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