1. Graduate Institute of Technology Management, Chung-Hua University 707, Sec. 2, WuFu Road, Hsin-Chu 300, Taiwan
2. Department of Industrial Engineering, Chung-Hua University, No. 707, Sec. 2, WuFu Road, Hsin-Chu 300, Taiwan,
3. Department of Industrial Management, Lunghwa University of Science and Technology, No.300, Sec.1, Wanshou Road, Guishan Shiang, Taoyuan 33306, Taiwan