1. Research Fellow, Construction Engineering and Project Management Program, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas at Austin, 301E Dean Keeton St. Stop C1752, Austin, TX 78712 (corresponding author).
2. Associate Professor, Construction Engineering and Project Management Program, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas at Austin, 301E Dean Keeton St. Stop C1752, Austin, TX 78712.