Mandatory procedures and ISO 9001:2015

Answer:

ISO 9001:2015 has no mandatory procedures required. It is up to each organization to decide to what extent it needs more or less documentation to support the operation of its processes. For example, organizations can use more documentation when processes are more complex, when turnover is high, when there is less training and experience, when there is a track record of quality problems. As an auditor, when there are no written procedures, one can give more attention to intended results and actual performance as the basis for audit preparation and realization.
These materials will also help you regarding the topic of preparing an audit:

• article - ISO 9001 Audit Checklist - https ://advisera.com/9001academy/knowledgebase/iso-9001-audit-checklist/
• article - Writing an Audit Checklist for ISO 9001 Processes - https://advisera.com/9001academy/blog/2014/11/25/writing-audit-checklist-iso-9001-processes/
• article - How to create a check list for an ISO 9001 internal audit for your QMS - https://advisera.com/9001academy/blog/2016/07/12/how-to-create-a-check-list-for-an-iso-9001-internal-audit-for-your-qms/
• article - List of mandatory documents required by ISO 9001:2015 - https://advisera.com/9001academy/knowledgebase/list-of-mandatory-documents-required-by-iso-90012015/
• 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/