Multiple criteria modelling and ordinal data: Evaluation in terms of subsets of criteria

In an earlier article an ordinal multiple criteria model was presented in which each member of a set of alternatives was given an evaluation on each member of a set K of criteria. In this paper we extend this concept to the situation where each alternative i can be assessed in terms of only a subset Ki of K. Various models are presented for dealing with this partial criteria case and the pros and cons of these models are discussed.