Process vs internal audit

When you think about audits you can think about product audits, process or horizontal audits, departmental or vertical audits.

When you think about audits you can think about first party (internal) audit, second party (auditing a supplier) or third party (certification audit).

You can make different combinations. Use this matrix:

You can find more information below:

• We can have vertical and horizontal audits. A horizontal audit is when you audit one process across many departments in the organization. A vertical audit is when you audit all the processes used by a department. Process audits are another name for horizontal audits. You can find more information in this article - ISO 9001 Horizontal audit vs. vertical audit - https://advisera.com/9001academy/blog/2015/03/03/iso-9001-horizontal-audit-vs-vertical-audit/ 
• First-, Second- & Third-Party Audits, what are the differences? - https://advisera.com/9001academy/blog/2015/02/24/first-second-third-party-audits-differences/ 
• Free online training 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/