The master’s thesis examines the introduction of the ISO 9001:2015 standard into a micro family – owned company, which produces aluminium alloys castings. The use of different quality assurance tools and methods is described. The requirements of the ISO 9001:2015 standard and the certification process are clarified. An analysis of the existing situation in the company is carried out. The steps for the introduction of the quality management system and the course of certification audits are explained. There are presented measures, changes and adjustments we have introduced for the effective alignment of the company’s management system with the ISO 9001:2015 requirements. In conclusion is evaluated the resulting situation in the company, after the successful acquisition of the certificate.