1. PhD Candidate, Institute of Technology and Engineering, Massey Univ., Tekura Hargarau-a-Ponaha, Private Bag 11222, Palmerston North, New Zealand.
2. Professor, Dept. of Building and Real Estate, Research Center for Construction Management and Construction IT, The Hong Kong Polytechnic Univ., Kowloon, Hong Kong.
3. Managing Director, Yau Lee Construction Co., Ltd., Kowloon Bay, Kowloon, Hong Kong.