1. School of Engineering and Technology, Central Queensland Univ., Rockhampton, QLD 4701, Australia (corresponding author).
2. Professor, Dept. of Building, National Univ. of Singapore, Singapore 117566.
3. Professor, Dept. of Construction Management, Tianjin Univ., Tianjin 300072, P.R. China.
4. Professor, School of Engineering and Technology, Central Queensland Univ., Rockhampton, QLD 4701, Australia.
5. Lecturer, School of Civil Engineering and Built Environment, Queensland Univ. of Technology, 2 George St., Brisbane, QLD 4001, Australia.