Multicriteria decision aid is an important branch of Operational Research. Beyond the exchanges and meetings which already exist by means of the international conferences and the publications in the scientific journals, the objectives of the working group are the following:

• to contribute to the development, at a European level, of an original way of thinking in the field of multicriteria decision aiding,
• to allow each member of the group to make to others methodological, theoretical or applied results, to submit its own work and thoughts to the critical discussion of the group and also facilitate some collaborations,
• to develop multicriteria aid for decisions by facilitating contacts with every people interested in the subject and by stimulating continuity and progress in exchanges and work,
• to keep the group alive and open by means of bi-annual meetings which must not be mini-conferences but real meetings favourable to exchanges,
• to emergence of news ideas.

The working group was created at EURO I (Brussels, 1975). Since that time, two meetings are held each year, in Spring and Autumn. The 44 meetings have been organised by 14 different countries. In the year 2000, the 50th meeting at Cerisy (France) cellebrated the Group's 25th Anniversary.