1. Assoc. Prof., Constr. Engrg. and Mgmt. Dept., King Fahd Univ. of Pet. & Minerals, Box # 680 Dhahran 31261, Saudi Arabia.
2. Asst. Prof., Constr. Engrg. and Mgmt. Dept., King Fahd Univ. of Pet. & Minerals, Box # 426, Dhahran 31261, Saudi Arabia.
3. Lect., Constr. Engrg. and Mgmt. Dept., King Fahd Univ. of Pet. & Minerals, Box # 680 Dhahran 31261, Saudi Arabia.