1. Chair Professor of Construction Management, Dept. of Construction Management, School of Built Environment, Curtin Univ. of Technology, GPO Box 1987, Perth, Western Australia 6845, Australia.
2. Senior Lecturer, Dept. of Civil and Building Engineering, Loughborough Univ., Loughborough, Leicestershire LE11 3TU, U.K. (corresponding author).
3. Research Assistant, Dept. of Construction Management, School of Built Environment, Curtin Univ. of Technology, GPO Box 1987, Perth, Western Australia 6845, Australia.
4. Head of School, Professor of Construction Procurement, School of Built Environment, Curtin Univ. of Technology, GPO Box 1987, Perth, Western Australia 6845, Australia.