European Working Group on Multiple Criteria Decision Aiding
The European Working Group on Multiple Criteria Decision Aiding (also, EURO Working Group on Multicriteria Decision Aiding, EWG on Multicriteria Aid for Decisions, or EWG-MCDA) is a working group whose objective is to promote original research in the field of multicriteria decision aiding at the European level.<ref name="http://www.cs.put.poznan.pl/ewgmcda">http://www.cs.put.poznan.pl/ewgmcda - EWG-MCDA webpage</ref> 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 by Bernard Roy during the First  European Conference on Operational Research (EURO I) held in Brussels, Belgium.<ref name="http://www.euro-online.org">http://www.euro-online.org - EURO, Association of European Operational Research Societies</ref> The objectives of the EURO Working Group on MCDA are the following: Since 1975, the Working Group has met invariably twice a year. 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. At the 72nd Meeting of the Group held in 2010 at the Ecole Centrale Paris, Bernard Roy stepped down from his position of the Group Coordinator and became the Honorary  Chairman.<ref name="Newsletter/Fall10">http://www.cs.put.poznan.pl/ewgmcda/newsletter/Fall10.pdf - EWG-MCDA Newsletter, Series 3, Number 22, Fall 2010</ref> The European School of MCDA. Most of the researchers or authors distinguish two major streams of MCDA methods: The development of the European School of Multiple Criteria Decision Aiding is mainly attributed to the EURO Working Group on MCDA. The European School directs its study to methodologies where the personal preferences of decision makers have less influence on the alternative chosen. The methods of the European School are the ELECTRE family methods (ELimination Et Choix Traduisant la REalité) which stems from the pioneering work  of Bernard Roy and whose development is strongly connected with the birth of the EWG on MCDA, and the PROMETHEE (PReference ranking Organization METHod for Enrichment Evaluations) method initiated by Professor Jean-Pierre Brans in the beginning of the eighties.