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. Ph.D. Candidate, Dept. of Electrical Engineering and Computer Science, Univ. of Michigan, 1301 Beal Ave., Suite 4429 EECS Bldg., Ann Arbor, MI 48109.
3. Assistant Professor, Dept. of Architectural and Urban Systems Engineering, Ewha Womans Univ., 52 Ewhayeodae-Gil, Seodaemun-Gu, Seoul 03760, Korea.
4. 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.