1. Member, ASCE
2. Assoc. Prof. of Constr. Mgmt., Dept. of Civ. Engrg., Univ. of Waterloo, Waterloo, ON, Canada N2L 3G1. E-mail: tarek@uwaterloo.ca
3. Consultant, Revay and Associates Ltd., 505 Consumers Rd., Ste. 306 Toronto, ON, Canada M2J 4V8. E-mail: tolgaersahin@sympatico.com