1. Associate Professor, Dept. of Architecture, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Reko St., 43600 UKM Bangi, Selangor, Malaysia.
2. Dept. of Architecture, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Reko St., 43600 UKM Bangi, Selangor, Malaysia.
3. Associate Professor, Dept. of Building Surveying, Faculty of Built Environment, Univ. of Malaya, Lingkungan Budi, 50603 Kuala Lumpur, Malaysia (corresponding author).