摘要: Abstract During the last four decades a large number of mainly mathematical tools have been developed in and for Operational Research. They are primarily devices to find optimal solutions after problem has modelled formally. Hardly any new proper modelling problems which not well-structured can easily be cast into classical models. Fuzzy Set Theory as proposed by L. Zadeh 1965 promises bridge part this gap. It is much more adaptable different structures better suited model human evaluation decision making processes, than mathematics. This paper will focus attention on questions: • Why Sets OR? What Sets? Where they used? How being
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