1. Member, ASCE
2. Associate Member, ASCE
3. Assoc. Prof., Dept. of Industrial Engrg., Tecnológico de Monterrey, Monterrey, N.L. 64849, México.
4. Asst. Prof., Dept. of Civ. Engrg., Clemson Univ., Clemson, SC 29630.
5. Prof., Mgmt. Grad. School, Tecnológico de Monterrey, Monterrey, NL 64849, México.