[1] Nanyang Technol Univ, Sch Mech & Prod Engn, Singapore 639798, Singapore
[2] Northeastern Univ, Dept Management & Ind Engn, Shenyang, Peoples R China
[3] Hong Kong Univ Sci & Technol, Dept Ind Engn & Engn Management, Kowloon, Hong Kong, Peoples R China