This course, called Quantitative Methods, presents to the learner the application of driven quantitative mathematical modeling that play determinant role in decision making related to business management emphasizing on the role of data in drawing conclusions. As we are living the days of information technologies, the course links theoretical skills acquired with practical competencies drawn from computer's software packages for solving operation research's problems. The course engages the learner in progressive learning procedures, from simple examples of the daily facts of the business life to the complex applications of the operation research in multidimensional business operations. The integration of the acquired skills and competencies are achieved whenever the learner will be able to make a right choice for tools that should help him to make smart and successful business decisions.