Applying Orthogonal Arrays Method to Solve Fuzzy Interval for Fuzzy Weighted Average

Fuzzy weighted average, as functions of fuzzy numbers, happens with the problem of multiple occurrences of fuzzy parameters (weights). Additional fuzziness may be introduced in the cut arithmetic. This paper based on an improved algorithm, called IFWA, applies orthogonal arrays method that is a fractional factorial experiment, to analysis weights adjustment. We will show a numerical example and demonstrate the usefulness of the orthogonal arrays method.