1. Associate Professor, Dept. of Construction Management, Faculty of Technology Management and Business, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia (corresponding author).
2. Associate Professor, Dept. of Electrical Power Engineering, Faculty of Electronic and Electric Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia.
3. Senior Lecturer, School of Built Environment, Faculty of Humanities, Bentley Campus, Curtin Univ., Perth, WA 6000, Australia.