Prof Ali D. Haidar, BSc, MSc, PhD has been extensively active in the construction industry for more than 25 years, and is currently a consultant for Dar al Riyadh (Engineering and Architecture) based in Saudi Arabia. He is a member of Institute of Transportation Engineers (USA), Institute of Civil Engineers (Lebanon) and Institute of Civil Engineers (Great Britain). Prof Haidar has also published two books and several journal papers on construction management and decision making techniques for the construction industry.