[1] EWG-MCDA is one of the working groups of EURO, the Association of European Operational Research Societies, and has approximately 350 members from 38 countries.

The Group was founded in 1975[2] by Bernard Roy during the First European Conference on Operational Research (EURO I) held in Brussels, Belgium.

The 50th Anniversary meeting of the Group was held in 1999 at the château of the Centre Culturel International de Cerisy-la-Salle, in France.

[4] Most of the researchers or authors distinguish two major streams of MCDA methods:[5] The development of the European School of Multiple Criteria Decision Aiding is mainly attributed to the EURO Working Group on MCDA.

[6][7] The European School directs its study to methodologies where the personal preferences of decision makers have less influence on the alternative chosen.