A new multi-objective mathematical model for supplier selection in uncertain environment

Nowadays, suppliers play an important role in development of sustainable Supply Chain Management (SCM). In this study, a novel multi-objective model has been proposed which takes into account the importance of objectives in an efficient way and considers the uncertainty of real world problems. In order to consider the mentioned uncertainty, the input data are defined as grey numbers. To solve the proposed mathematical multi-objective model based on grey numbers, it has been formulated in the form of Fuzzy Goal Programming (FGP); then, it has been converted to Grey Linear Programming (GLP). Eventually, a sensitivity analysis has been carried out in order to show the performance of the proposed model.