1. Chair Professor and Head, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., 11 Yuk Choi Rd., Hung Hom, Kowloon, Hong Kong, China.
2. Ph.D. Candidate, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., 11 Yuk Choi Rd., Hung Hom, Kowloon, Hong Kong, China (corresponding author).
3. Lecturer, Dept. of Construction and Surveying, Kingston Univ., Kingston upon Thames, Southwest London KT1 2EE, U.K.
4. Senior Lecturer, Dept. of Building Technology, Kwame Nkrumah Univ. of Science and Technology, Kumasi, Ghana.