Nikbakhsh Javadian - Department of Industrial Engineering, College of Technology, Mazandaran University of Science & Technology, P.O. Box ۷۳۴, Babol, Iran.
Mohammad Kazemi - Department of Industrial Engineering, College of Technology, Mazandaran University of Science & Technology, P.O. Box ۷۳۴, Babol, Iran.
Mehdi Amiri-Aref - Department of Industrial Engineering, College of Technology, Mazandaran University of Science & Technology, P.O. Box ۷۳۴, Babol, Iran.
Fahime khaksar-Haghani - Department of Industrial Engineering, College of Technology, Mazandaran University of Science & Technology, P.O. Box ۷۳۴, Babol, Iran.

This paper presents a fuzzy multiple criteria group decision making (FMCGDM) problem with the Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) based on the new concept of positive and negative ideal solution. Triangular fuzzy numbers (TFN) among decision making process is used to evaluate the weighted different alternatives versus various criteria and a fuzzy group weight is made by different experts. Additionally, in this paper we examine this algorithm with different fuzzy distance, obtain interesting result and show this result in three tables. This result indicates that fuzzy distance used in this paper is better than other fuzzy distance for this algorithm.

Fuzzy distance, Positive and Negative Ideal Solution, TOPSIS, Fuzzy numbers