[1][2] ECCO is one of the working groups of EURO, the Association of European Operational Research Societies.

The Group was founded in 1987 by Catherine Roucairol, Alexander Rinnooy Kan, and Dominique de Werra.

The Advisory Board is currently composed of Jacek Błażewicz, Van Dat Cung, Alain Hertz, and Paolo Toth.

[3] The group is suitable for people who are presently engaged in Combinatorial Optimization, either in theoretical aspects or in business, industry or public administration applications.

ECCO holds conferences on a regular basis (once a year during Spring).