1. Assoc. Prof., Dept. of Build. and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong.
2. Res. Asst., Dept. of Build. and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong.
3. Acting Head of Dept., Dept. of Build. and Constr., City Univ. of Hong Kong, Tat Chee Ave., Kowloon, Hong Kong.