Bernard Roy’s works have founded the european school of multicriteria decision aiding and, more broadly speaking, are a key contribution to the foundation of scientific decision aiding approaches. Aiding. they are based upon several major breakthroughs with regard to traditional operational research and to the works of F.W. Taylor’s successors in management. Roy’s intellectual and scientific biography highlights it well. On many research projects and studies, the limits of classical decision-making models appear – the ones related to the existence of a unique, substantive rationality and to a possible optimization of choices. Bernard Roy contributed to the birth of a paradigm with three pillars : decision aiding with multiple criteria, robust and satisfying choices rather than optima, and a certain vision of the decision aiding activity focused on value relevant solutions rather than on the search for an optimum.
