1. Professor of Construction Engineering and Management, Dept. of Civil and Environmental Engineering, Faculty of Engineering and Architecture, American Univ. of Beirut, Bechtel Engineering Bldg., P.O. Box 11-0236, Riad El Solh, Beirut 1107 2020, Lebanon (corresponding author).
2. Graduate Student, Engineering Management Program, Faculty of Engineering and Architecture, American Univ. of Beirut, Bechtel Engineering Bldg., P.O. Box 11-0236, Riad El Solh, Beirut 1107 2020, Lebanon.