Multiset Tools for Group Multiple Criteria Decision Aiding

The paper describes the new tools for group sorting and ordering multi-attribute objects, when several versions of object may exist. For instance, values of attributes are estimated by several actors upon many quantitative and qualitative criteria or measured in different ways. These methods are based on the verbal decision analysis and the theory of multiset metric spaces. The developed techniques were applied to the multiple criteria selection of competitive R&D applications and the evaluation of project efficiency in the Russian Foundation for Basic Research.