1. Professor, Construction Engineering and Management, Dept. of Civil and Environmental Engineering, College of Engineering, King Faisal Univ., Al-Ahsa, Saudi Arabia 31982; formerly, Professor and Head, Dept. of Construction Engineering and Management, School of Civil and Environmental Engineering, National Univ. of Sciences and Technology, Islamabad 44000, Pakistan (corresponding author).
2. Ph.D. Candidate, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hong Kong.