The level 1 assessment is a self-assessment that is not audited by a service provider. It is therefore mostly only used for internal purposes. These assessment results are only of limited validity and do not constitute a valid TISAX label. Most manufacturers therefore require at least Assessment Level 2. In this case, the self-assessment is audited by an accredited auditor. These assessments are often carried out by telephone. An on-site test is only conducted if you have the "prototype protection" module tested or explicitly request an on-site test. At Level 3, a comprehensive on-site audit of your self-assessment is carried out by an auditor. This takes 2-3 days on average.