1. Professor and Chair, Construction Engineering and Management, Univ. of Wisconsin-Madison, 2320 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706 (corresponding author).
2. Former Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, Madison, WI 53706.
3. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin-Madison, 2256 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.