Affiliation: | a Department of Industrial Engineering, National Taipei University of Technology, 1 Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC b Department of Leisure, Recreation and Tourism Management, Shu-Te University, Kaohsiung County 824, Taiwan, ROC c Division of System Information, Foxconn Industrial PCE Production Group, Hsing-Chu, Taiwan, ROC |