1Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran, Iran
2Department of Mathematics, Science and Research Branch, Islamic
Azad University, Tehran, Iran
Ranking fuzzy numbers plays a very important role in decision making and some other fuzzy application systems. Many different methods have been proposed to deal with ranking fuzzy numbers. Constructing ranking indexes based on the centroid of fuzzy numbers is an important case. But some weaknesses are found in these indexes. The purpose of this paper is to give a new ranking index to rank various fuzzy numbers effectively. Finally, several numerical examples following the procedure indicate the ranking results to be valid.