PROBLEMS WITH DECISION AIDS - ENRICHMENT OF THE CHOICE-SORTING-RANKING SYSTEM

In this article we establish a classification and we discuss the diffe rent ''problematiques'' that may be in question in a certain stage of a decision-aid study. We enlarge the trilogy ''choice, sorting and ran king'', introduced by Bernard Roy, reinforcing the importance of this subject in the methodological context of decision-aid. First we distin guish decisional problematique from technical or decision-aiding probl ematique. Afterwards, we reflect oil three questions: Do we want a rel ative comparison or an absolute evaluation of the actions?, to make a choice or to rank the actions?, to accept or to reject actions?