1. Ph.D. Candidate, School of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Dr. N.W., Atlanta, GA 30332-0355.
2. Assistant Professor, Dept. of Construction Management, College of Built Environments, Univ. of Washington, 120D Architecture Hall, Box 351610 Seattle, WA 98195-1610.
3. Associate Professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, 790 Atlantic Dr. N.W., Atlanta, GA 30332-0355 (corresponding author).
4. Dept. of Construction Management, College of Built Environments, Univ. of Washington, 120D Architecture Hall, Box 351610 Seattle, WA 98195-1610.