ABSTRACT
This chapter discusses a hybrid multi-criteria decision-making framework using Grey-Analytical hierarchy process (AHP) and Grey- technique for order preference by similarity (TOPSIS) methods. The AHP and TOPSIS methods are both well known and well studied in multi-criteria decision-making problems. Grey systems are gaining popularity in the literature due to their ability to cope with uncertainty. Grey sets are sometimes perceived as an extension of interval valued fuzzy sets with additional advantages over fuzzy systems. Similarly to fuzzy theory, grey theory is appropriate for problems with some levels of uncertainty and indetermination. This multidisciplinary and generic theory deals with systems characterized by poor information and/or systems where information is lacking. In grey systems theory, if the system information is fully known, the system is called a white system. S. H. Hashemi et al. developed a grey-based carbon management model for green supplier selection.
