1. Intelligent Manufacturing Research Center, National Cheng Kung University, Tainan, Taiwan
2. Department of Information Management, National Taiwan University, Taipei, Taiwan
3. Department of Computer Science and Information Engineering, Chinese Culture University, Taipei, Taiwan
4. Department of Mathematics and Computer Science, University of Hagen, Hagen, Germany
5. School of Engineering and Technology, Central Michigan University, Mount Pleasant, MI, USA
6. Department of Industrial and Systems Engineering, College of Engineering, University of Wisconsin–Madison, Madison, WI, USA