1. Ph.D. Student, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, China (corresponding author).
2. Professor and Interim Dean, Faculty of Construction and Environment, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, China.
3. Professor and Head, Dept. of Construction Management and Real Estate, Tongji Univ., Shanghai 200092, China.
4. Ph.D. Student, Dept. of Architectural Engineering, Univ. of Seoul, Seoul, Republic of Korea.