Project management is the tool of an organization that enables to achieve good quality and successful results as quickly as possible. This paper presents the historical development of this discipline, where some modulation can be noticed over time. Through the life cycle of the project, there are visible principles needed to be met for the successful completion of the project. Following the growing momentum of implementation of project management in everyday business, the advantages and disadvantages of the main structural organisational forms of project management were explored. There was a big difference between the applied organization systems within the company, with an emphasis on project implementation. If it is a smaller volume of a company or organization, they are implementing the some adjustment process for the duration of the project. For larger organizations or companies, it is most often a separate department that is in charge of projects. By further comparing and analyzing the projects of the European Union, there are problems with the low use of funds secured from the budget period 2014-2020. Although the projects are good quality and successful, they are inadequate. By showing and inspecting several successful projects on the territory of the Republic of Croatia, it can be seen that there is still a great need for investment through projects.