1. Assistant Professor, Dept. of Construction Engineering and Management, Engineering School, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering; and Director, Project Production Systems Laboratory, Univ. of California, Berkeley, CA 94720-1712.
3. Research Director, Project Production Systems Laboratory, Dept. of Civil and Environmental Engineering, Univ. of California, Berkeley, CA 94720-1712.