Ph.D., Computer Science, University of Franche Comte – Besançon, France, 2003. Youssef Harrath is an assistant professor at the University of Bahrain, College of Information Technology. He received his B.Sc. in Applied Mathematics from the University of Science, Monastir-Tunisia in 1998. He obtained his M.Sc. degree in Operational research, Combinatorial, and Optimization from the International Polytechnic Institute, Grenoble-France in 2000. He received his Ph.D. in Computer Science from the University of Franche Comte, Besançon-France in 2003. Dr. Youssef has a teaching experience as assistant professor at international universities such as University of Bahrain, KFUPM, Saudi Arabia, and High Institute of Applied Computer Sciences of Lorraine, France, and National Institute Of Applied Science, France. Youssef Harrath is actively working in many research areas such as: scheduling and optimization. He has more than 20 publications in International journals and conferences.