1. Ph.D. Candidate, Tishman Construction Management Program, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., Suite 1148 G.G. Brown Bldg., Ann Arbor, MI 48109.
2. Assistant Professor, Dept. of Architectural and Urban Systems Engineering, Ewaha Womans Univ., 52 Ewhayeodae-Gil, Seodaemun-Gu, Seoul 03760, Korea.
3. 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).