1. Assistant Professor, Dept. of Building and Construction, City Univ. of Hong Kong, Tat Chee Ave., Kowloon Tong, Hong Kong (corresponding author).
2. Ph.D. Candidate, Dept. of Building and Construction, City Univ. of Hong Kong, Tat Chee Ave., Kowloon Tong, Hong Kong.
3. Assistant Quantity Surveyor, Davis Langdon & Seah Hong Kong Limited, 2101 Leighton Centre, 77 Leighton Rd., Hong Kong, China.