Hu Dandan was born in 1983. She received B.S. degree in information management and information system from Wuhan University of Technology. Now she is a Ph,D. candidate in management science and engineering from Huazhong Technology. Her research decision-making. University of Science and interest is management E-mail: hudandan1224@163.com Yang Chao was born in 1963. He received his B.S. degree in mathematics from Henan Normal University, M.S. degree in applied mathematics form Huazhong University of Science and Technology, and Ph.D. degree in management science form City University of Hongkong. He is currently employed professor in Management School, Huazhong University of Science and Technology. His main research is management decision-making. E-mail: chao_yang@mail.hust.edu.cn Yang Jun was born in 1977. She received her B.S. and M.S. degrees in Wuhan University of Technology, and Ph.D. degree in management science and engineering from Huazhong University of Science and Technology. At present she is an associate professor there. Her research interests are supply chain and location.