1. Research Fellow, Center of Project and Facilities Management (PFM), Faculty of Built Environment, Univ. of Malaya, 50603 Kuala Lumpur, Malaysia.
2. Professor, Center of Project and Facilities Management (PFM), Faculty of Built Environment, Univ. of Malaya, 50603 Kuala Lumpur, Malaysia.
3. Associate Professor, Center of Project and Facilities Management (PFM), Faculty of Built Environment, Univ. of Malaya, 50603 Kuala Lumpur, Malaysia.