External or Supplier Audits

You can follow exactly the same procedure as for internal audits. Where you should invest more time is in the audit scope definition and in the audit objective definition. Please check Annex “A.12 Audit of supply chain” in ISO 19011:2018.

Please find below more detailed information:

• First-, Second- & Third-Party Audits, what are the differences? - https://advisera.com/9001academy/blog/2015/02/24/first-second-third-party-audits-differences/
• Why should companies perform a second-party audit of their supplier’s QMS? - https://advisera.com/9001academy/blog/2017/09/12/why-should-companies-perform-a-second-party-audit-of-their-suppliers-qms/
• ISO 9001:2015 Internal Auditor Course: https://advisera.com/training/iso-9001-internal-auditor-course/
• Book - ISO internal audit: A plain English guide: https://advisera.com/books/iso-internal-audit-plain-english-guide/