1. Assistant Professor, Construction and Facilities Management, Ira A Fulton College of Engineering and Technology, Brigham Young Univ., Provo, UT 84602 (corresponding author).
2. Director, School of Sustainable Engineering and the Built Environment, and Professor and Sunstate Chair of Construction Management and Engineering, Arizona State Univ., P.O. Box 873005, Tempe, AZ 85287-3005.