Decision Support & Operations Research Group

Directed by Marino Widmer and Bernard Ries, the Decision Support and Operations Research group develops mathematical theories, models, algorithms and systems supporting decision making in complex situations.


Who we are and what we do.

The Team


The group is active in the following research areas:

  • Combinatorial optimization and graph theory
  • Heuristic and meta-heuristic methods
  • Mathematical programming
  • Decision support: models, methods and applications

Read more


  • First comic related to the use of mathematics in real life!
  • Paper accepted in EJOR!
  • Best Paper Award at ISAAC 2023!
  • Paper accepted in Computers and Operations Research!
  • Two papers accepted in Algorithmica!
  • Vera Fischer -> Dr. Vera Fischer!

All News