1. Instructor, Engineering Management Program, American Univ. of Beirut, P.O. Box 11-0236, Riad El Solh 1107-2020, Beirut, Lebanon (corresponding author).
2. Assistant Professor, Dept. of Civil and Environmental Engineering, American Univ. of Beirut, P.O. Box 11-0236, Riad El Solh 1107-2020, Beirut, Lebanon.