The paper describes the quality management system, and the relevant documentation in the construction sector, which is divided into general, which is applied in all projects on which the company works, and specific, which is applied to each individual project. The legislative framework and technical regulations were analyzed. Certification of the quality management system is not mandatory by law, but today's market imposes on companies the need to introduce a quality system for competitiveness. The paper describes the mandatory content and equipment of construction projects. There are several approaches to the quality management system, the best known being the system based on the requirements of the HRN EN ISO 9001 Series of quality management systems - Requirements. The paper analyzes the standard HRN EN ISO 10005 Quality Management Systems - Guidelines for quality plans, which contains instructions and guidelines for the development of quality plans. The law prescribes the development of a control and quality assurance program that is an integral part of the main construction project. The quality plan and its content are analyzed, its role in achieving quality during the execution of reinforced concrete works as part of the quality management system of a particular contractor is presented. The quality plan plans, ensures and demonstrates the scope and methods of quality assurance that the contractor plans to undertake. With the quality plan, the contractor elaborates to the designer and the investor on how to carry out quality control and how to document it and achieve the required level of quality required by the project. In a construction project, such a plan ensures the completion of the project within the agreed time and the envisaged financial resources, efficient spending of resources, meeting the designed and prescribed technical conditions in accordance with the requirements of the client and investors.