Corresponding author.Feng Yang was born in 1977. He is a lec- turer in School of Management, University of Science and Technology of China. His research interests include data envelopment analysis and multi-criteria decision modeling. E-mail: fengyang@ ustc.edu.cn Liang Liang was born in 1962. He is a profes- sor in School of Management, University of Sci- ence and Technology of China. His research in- terests include supply chain management and de- cision science. E-mail: lliang@ustc.edu.cn Zhaoqiong Li was born in 1983. He is a Ph.D. candidate in School of Management, University of Science and Technology of China. His research interests include data envelopment analysis and multi-criteria decision modeling. E-mail: zqli @ mail.ustc.edu.cn Shaofu Du was born in 1980. He is a lecturer in School of Management, University of Science and Technology of China. His research interests in- clude decision analysis and supply chain manage- ment. E-mail: dsoft@ustc.edu.cn