1. Professor, Construction Engineering and Management, Dept. of Civil and Environmental Engineering, College of Engineering, King Faisal Univ., Al-Ahsa-31982, Kingdom of Saudi Arabia; formerly, Professor and Head, Dept. of Construction Engineering and Management, School of Civil and Environmental Engineering, National Univ. of Sciences and Technology, Islamabad, Pakistan (corresponding author).
2. Planning Engineer, Drake and Scull Construction, P.O. Box 9778, Riyadh 11423, Kingdom of Saudi Arabia; formerly, Graduate Student, Dept. of Construction Engineering and Management, School of Civil and Environmental Engineering, National Univ. of Sciences and Technology, Islamabad, Pakistan.
3. Deceased; formerly, Professor, M. E. Rinker, Sr. School of Building Construction, Univ. of Florida, Gainesville, FL 32611-5703.
4. Associate Dean, School of Sustainable Building and Environmental Management, Northern Alberta Institute of Technology (NAIT), Edmonton, Canada T5G 2R1.