Fuzzy scores of technical efficiency

This paper suggests to extend scores of technical efficiency as used in, for example, Data Envelopment Analysis to efficiency scores defined as so-called fuzzy intervals. Fuzzy scores allow the decision maker to use scores of technical efficiency in combination with other sources of available performance information, e.g. expert opinions, key figures etc. In this sense fuzzy scores become formal images of the evaluation otherwise done implicitly by the decision maker and may therefore enhance a more consistent evaluation. It is shown how to rank a set of fuzzy scores.