1. Assistant Professor Mem. ASME K-School, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea e-mail:
2. Professor Ross School of Business, Department of Statistics, University of Michigan, Ann Arbor, MI 48109 e-mail:
3. Professor Fellow ASME Optimal Design Laboratory, Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109 e-mail: