1. Postdoctoral Fellow, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., 11 Yuk Choi Rd., Hung Hom, Kowloon, Hong Kong.
2. Associate Professor, Tishman Construction Management Program, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Suite 2340 G.G. Brown Bldg., Ann Arbor, MI 48109 (corresponding author).
3. Professor, Dept. of Architecture and Architectural Engineering, Seoul National Univ., 1 Gwanak-ro, Suite 425 Bldg. #39, Gwanak-gu, Seoul 08826, Korea.