1. Assistant Professor, Construction and Building Engineering, Arab Academy for Science, Technology, and Maritime—Sheraton Heliopolis, Cairo 11799, Egypt.
2. Hurst-McCarthy Professor of Construction Engineering and Management, Dept. of Civil, Architectural, and Environmental Engineering and Dept. of Engineering Management and Systems Engineering, Missouri Univ. of Science and Technology, Rolla, MO 65401; formerly, Associate Professor and Construction Engineering and Management Program Coordinator, Dept. of Civil and Environmental Engineering, Univ. of Tennessee–Knoxville, Knoxville, TN 37996 (corresponding author).