Document ID

ISO 9001:2015, clause 7.5.2 a), invites each organization to determine a document identification methodology, it gives some examples but does mandate a particular solution.

Without seeing the different types of documents and where are they located in document structure as presented in this article - How to structure quality management system documentation - https://advisera.com/9001academy/knowledgebase/how-to-structure-quality-management-system-documentation/ - it is not very easy. The point is, your organization can design its own way for each kind of documents: a name, a code, a number. Isolated or linked to processes, to departments, to lines of business.

You can find more information about documentation below:

• New approach to document and record control in ISO 9001:2015 - https://advisera.com/9001academy/blog/2015/06/30/new-approach-to-document-and-record-control-in-iso-90012015/
• Some tips to make Document Control more useful for your QMS - https://advisera.com/9001academy/blog/2014/05/20/tips-make-document-control-useful-qms/
• Free online training ISO 9001:2015 Foundations Course - https://advisera.com/training/iso-9001-foundations-course/
• Book - Managing ISO Documentation: A Plain English Guide - https://advisera.com/books/managing-iso-documentation-plain-english-guide/