1. Senior Lecturer, Dept. of Construction Management, Curtin Univ., Perth WA 6845, Australia.
2. John Curtin Distinguished Professor, Dept. of Construction Management, Curtin Univ., Perth WA 6845 Australia (corresponding author).
3. Professor and Associate Dean, Dept. of Civil and Architectural Engineering, City Univ. of Hong Kong, Hong Kong SAR, China.