Taking decisions by using fuzzy models

In the most specialty papers, a mathematical model for establishing the best decisional alternatives is a couple M=(R, K) made up of a matrix R with m lines and n columns and a column vector K with m components. The mathematical modeling of an uncertain information evaluates its most probable value am and the minus possible values as and plus ad. The three real values form an ordered triplet named fuzzy triangular number. A fuzzy model for establishing the best decisional alternative is a couple formed by the results matrix having fuzzy triangular numbers as elements and the importance coefficients vector K. These models, (fuzzy and/or classical) are equivalent models related to a method of hierarchy of decisional alternatives if the two models have the same criteria and alternatives and by using the method to both models, the same hierarchy is obtained.