The subject of this course is to understand the role, functions, management and decision-making process, as well as the determinants of a company’s performance. The course first describes the basic concepts of the overall operation of the economic environment, while then analyzes the role and form of modern business. In the next section we focus on the inside of the company and explore its main functions such as the development of the production process, sales, technology and innovation management, human resource management, financial management, etc. Finally, in the third thematic unit of the course, costing and invoicing methods are analyzed, as well as basic tools and techniques of investment evaluation, in order to form a complete picture of the way in which decisions are made and the business strategy is formed.