1. Center of Project and Facilities Management (PFM), Faculty of Built Environment, Univ. of Malaya, 50603 Kuala Lumpur, Malaysia (corresponding author).
2. Dept. of Real Estate & Construction, Oxford Brookes Univ., Oxford OX3 0BP, U.K.
3. Dept. of Civil Engineering, Faculty of Engineering, Univ. of Malaya, 50603 Kuala Lumpur, Malaysia.
4. Center of Project and Facilities Management (PFM), Faculty of Built Environment, Univ. of Malaya, 50603 Kuala Lumpur, Malaysia.