Mojtaba mirzadeh - Industrial Engineering , payam noor University ,Tehran, Iran
Mahdi Bashiri - Shahed University ,Tehran ,Iran

interval-valued trapezoidal intuitionistic fuzzy number IVTIFNs is a special intuitionistic fuzzy set on a real number set. IVTIFNs are useful to deal with ill-known quantities in decision data and decision making problems. The purpose of this paper is to develop an extended grey relational analysis (GRA) method for solving MCDM problems with interval-valued trapezoidal intuitionistic fuzzy numbers. a illustrative example is given to verify the developed approach and to demonstrate its practicality and effectiveness.

Grey relational analysis (GRA), interval-valued trapezoidal intuitionistic fuzzy number, Multiple criteria decision making (MCDM)