1. Executive Vice President, Projects, Mazaya Holding Co., Kuwaiti Shareholding Company (Holding), P.O. Box 3546, Safat 13036, State of Kuwait (corresponding author).
2. Lecturer in Construction Management and Director of Postgraduate Programs, School of Construction Management and Engineering, Univ. of Reading, Whiteknights, P.O. Box 219, Reading RG6 6AW, UK.