Project management applies processes, knowledge, skills, methods and experiences that focus on the activities needed to meet project requirements. Succeedingly satisfying project requirements makes an organization a leader in their area of business. Every organization strives to implement projects efficiently and successfully, because of this, more and more attention is paid to project management. In order for organizations to secure their competitiveness in the market and to establish and strengthen their own position, it is necessary that they constantly work on strengthening their own project management. There are methods of measuring maturity of project management in organizations. They enable organizations to identify ways to improve their own business. Methods that organizations use are OPM3, CMMI, P3M3 and MINCE. Each of these methods has its advantages and disadvantages. Although each model is good because it allows the organization to gain insight into its own business and to note the disadvantages or areas where it is possible or necessary to improve, the most comprehensive image of project management maturity in an organisation is shown in the OPM3 model. Measuring the maturity of project management in organizations is a time consuming and rather complicated process that never stops because it is always possible to find new, better and more effective ways to develop and improve your business.