Application of fuzzy sets theory methods for the evaluation of investment efficiency parameters

The estimation of financial efficiency of the investments, as well as any forecasting, is a rather uncertain problem. In this article the technique for the fuzzy interval evaluation of financial parameters, developed by the authors is presented. As the result the technique proposed gives the fuzzy interval and weighted non-fuzzy values for the most used financial parameters NPV and IRR, as well as the quantitative estimation of investment's risk.