1. Assistant Professor, Dept. of Construction Management, Tsinghua Univ., Beijing 100084, China (corresponding author).
2. Assistant Professor, Sonny Astani Dept. of Civil and Environmental Engineering, Univ. of Southern California, Los Angeles, CA 90089.
3. Professor and Chair, Sonny Astani Dept. of Civil and Environmental Engineering, Univ. of Southern California, Los Angeles, CA 90089.