Concluding Remarks

During the last 25 years, fuzzy set theory has been applied in many disciplines such as operations research, management and decision science, artificial intelligence/expert systems, control theory, statistics, etc. In this study, we concentrate on (fuzzy) multiple objective decision making which is one of the most important fields in operations research, and management and decision science. This study provides readers and researchers with a capsule look into existing methods, their characteristics and their applicability to multiple objective decision analysis under crispness, fuzziness and imprecision.