Auditing methodology differences

There is no difference in terms of methodology between 1st, 2nd, and 3rd party audits. They all have to be prepared, executed, and reported according to ISO 19011 requirements.

You can find more information below:

• Please check this article - First-, Second- & Third-Party Audits, what are the differences? - https://advisera.com/9001academy/blog/2015/02/24/first-second-third-party-audits-differences/
• Free webinar on-demand - How to perform an ISO 14001:2015 internal audit - https://advisera.com/14001academy/webinar/how-to-perform-an-iso-14001-2015-internal-audit-free-webinar-on-demand/
• You can also attend this free course – ISO 14001:2015 Internal Auditor Course - https://advisera.com/training/iso-14001-internal-auditor-course/
• Book - ISO internal audit: A plain English guide: https://advisera.com/books/iso-internal-audit-plain-english-guide/