Writing a nonconformity

Answer
If you keep things at such an abstract level, then the clause has to be very general. I would use clause 4.4.1 because of its introduction: failure to implement or maintain processes. Normally, nonconformities are defined at a much specific level. For example, failure to follow the internal process at the commercial level can be associated to clause 8.2.

The following material will provide you information about audit nonconformities:
- Article – How to write a good ISO 9001 audit nonconformity? - https://advisera.com/9001academy/blog/2018/04/24/how-to-write-a-good-iso-9001-audit-nonconformity/
- ISO 9001:2015 Internal Auditor Course - https://advisera.com/training/iso-9001-internal-auditor-course/
- Book - Discover ISO 9001:2015 Through Practical Examples - https://advisera.com/books/discover-iso-9001-2015-through-practical-examples/