Quality audit in manufacturing company

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/

We can have also product audits.

The following material will provide you information about audits:

• ISO 9001 – ISO 9001 internal auditor training: Is it for me? - https://advisera.com/9001academy/blog/2015/06/02/iso-9001-internal-auditor-training-is-it-for-me/
• 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/