The article discusses various aspects of project management, which is one of the most effective tools and allows you to skillfully take into account various factors, as a result of which the reliability of implementing successful changes and achieving goals in all types of professional activities increases. In Kazakhstan, project management dates back to the 1990s, but the real practical application of this management tool is observed at the beginning of this century. According to the authors, one of the key problems of widespread implementation and use of the project approach in the private and public sectors is the lack of information and methodological support for the development of this area. The purpose of this study is to systematize the theoretical and methodological aspects of project management in the context of improving the quality and efficiency of economic decisions. Any project is a change that is caused by the creation of innovations and the corresponding investment and other resources, on the one hand, and on the other hand, is implemented in conditions of high uncertainty and risks. The research uses the following methods: comparative analysis, a systematic approach based on which General and specific features of project management are identified, as well as abstract-logical. In the context of globalization, modern management principles require a team approach to solve problems aimed at achieving the strategic goals of companies, organizations and States, as well as ensuring continuous improvement of business processes, implementing any changes of a socio-economic, organizational or other nature. The processes that ensure an effective transition to project technologies, as well as important components of the project approach from the point of view of achieving project goals are identified. It is shown that project management is especially widely used in private companies. Currently, this tool is being actively implemented in the management system of state structures in different countries. The significance of the research results lies in the fact that knowledge about the project approach is generally recognized scientific direction, which is characterized as an independent sphere of professional activity and a system of lean management aimed at improving the economic efficiency of implemented projects. In General, despite the noticeable activation of project management promotion processes in Kazakhstan, it should be noted that an important task is to transfer modern technologies of the project approach as a tool for innovative development to all spheres of life of the Kazakh society.