FUZZY ORDER EQUIVALENT CLASS WITH UNCERTAINTY

1. Introduction The AHP (Analytic Hierarchy Process), an analyzing method of multi-attribute and multi-criterion decision making, was first put forward by the American scientist Saaty. It decomposes a complicated problem into several levels in order to make the analysis of the original problem much simpler and quantifying the decision maker's subjective comparison (Saaty 1980, Saaty & Vargas 1987, Saaty 1990, Saaty 2003). However, there is an extensive literature which addresses the situa…

Fuzzy order equivalent class with uncertainty

It is a new research topic to create a rational judgment matrix using the cognition theory because of the construction of judgment matrix in AHP involving the decision-maker's cognitive activities. Owing to the presence of uncertain information in the decision procedure, the improper use of the uncertain information will doubtless cause weight changes. In this paper, we add a feedforward process prior to constructing the judgment matrix so that the decision maker can use both the certain and uncertain information to get the initial uncertain rough judgment matrix, and then convert it into a fuzzy matrix. Consequently, it will be better for decision maker to obtain the rough set of order equivalent classes through the decision graph. According to the qualitative analysis, the decision maker can easily construct the final judgment matrix instructed by the rough set created earlier.