1. Lecturer, Dept. of Quantity Surveying, Faculty of Built Environment, Univ. of Malaya, Kuala Lumpur 50603, Malaysia (corresponding author).
2. Associate Professor, Associate Head (Partnership) and Departmental Student Exchange Officer, Dept. of Building and Real Estate, ZS725, South Tower, 7/F, Block Z, Hong Kong Polytechnic Univ., 11 Yuk Choi Rd., Hung Hom, Hong Kong.