Research of supplier evaluation approach based on interval-valued intuitionistic fuzzy relations

Aiming at the complex fuzzy relations in supplier evaluation, and under the conditions that the weights of the evaluation indicators are given, a decision model is proposed based on Interval-valued intuitionistic fuzzy relations. It discusses the methods of aggregating operators after a deeply study on the Interval-valued intuitionistic fuzzy relations, defines the score function and accuracy function of Interval-valued intuitionistic fuzzy number, and elaborates the algorithm of proposed approach in detail. Finally, the practical application of the model is verified through analyzing instances. The result indicates that this model can be widely applied to practice.