Decision support systems help decision makers in selecting the best case/situation/action out of a list of candidates. In our group we study multi-criteria decision analysis systems. In such systems, the user describes her/his preferences in criteria that must be (partially) satisfied.
Research topics studied by the group are related to better reflecting the criteria specification and reasoning of a decision maker. Other topics are related to group decision making where multiple decision makers are involved and to the handling of imperfect data (in those cases where not all data are available as should be expected in an ideal world).