The aim of diploma thesis "The changes of quality management audit procedures within ISO 9001:2015" is to show how big impact the changes in audit procedures generally have on audit process and auditors themselves according to new ISO norm 9001:2015 against ISO norm 9001:2008 which is valid on the territory of the Slovak Republic and point them out while maintaining the individual quality management certification audit points. The content of the practical part is the GAP analysis according to ISO 9001:2015 vs. ISO 9001:2008, awareness of these changes and the implications for the auditing process for the auditors themselves when issuing quality certificates.