This research aims to evaluate the relationship between using the quantitive methods in decisions making and improving the performance in the industrial engineering companies in the Syrian coast , The importance of these methods and they are large role that its playing in making scientific and logical decisions to solving problems, which faces decision makers in these companies. These methods provide a set of alternatives that help decision makers to choose the best alternative among these available alternatives to solve the problem that face them, this reflects positively on the performance of these companies, and their role on industry.