Decisions and evaluations by hierarchical aggregation of information

Authors:
H. -J. Zimmermann;P. Zysno
Affiliations:
-;-
Venue:
Fuzzy Sets and Systems
Year:
1983

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Abstract

Usually, in preparing a decision a hierarchy of criteria for evaluating alternatives can he agreed upon by the decision makers. The problem addressed in this paper is the appropriate modelling of such evaluations and their aggregation in order to arrive at a proper overall evaluation function by which the decision alternatives can be ordered easily. Representing the criteria (subjective categories) by fuzzy sets it is possible to use aggregation operators as models for the amalgamation of those criteria. In the framework of an empirical research project a hierarchy of criteria was developed for the evaluation of credit worthiness of customers. 50 credit applications were evaluated by a number of credit managers of banks and their judgement could be appropriately modelled by a four level hierarchy of criteria.