1. Ph.D. Candidate, Dept. of Real Estate and Construction, Univ. of Hong Kong, Pokfulam Rd., Hong Kong.
2. Assistant Professor, Dept. of Real Estate and Construction, Univ. of Hong Kong, Pokfulam Rd., Hong Kong (corresponding author).
3. Professor, Dept. of Industrial and Manufacturing Systems Engineering, Univ. of Hong Kong, Pokfulam Rd., Hong Kong.
4. Professor, Dept. of Architectural Engineering, Pennsylvania State Univ., 104 Engineering Unit A, University Park, PA 16802.