Work on multicriteria analysis has long been an important part of IIASA's research agenda. Multicriteria problems arise in virtually all of the real systems studied a t IIASA, and methods for handling various aspects of these problems are still being developed. One important aspect of multicriteria techniques lies in the overall evaluation or ranking of alternatives in terms of a number of possibly conflicting criteria. Virtually all of the existlng methods assume that the analyst has access to quantitative information on criteria weights and the performance of each option with respect to individual criteria, although t b s is very rarely the case. In general the analyst is presented with a mixture of quantitative and qualitative data from which he must derive his conclusions. In t h s paper, Henk Voogd from the University of Delft develops a new multicriteria evaluation approach capable of handling mixed quantitative and qualitative data, and illustrates how it may be applied to an urban planning problem.
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