Locating a nonconformity

If the machine was programmed to reject bad parts, we can conclude that the machine is a monitoring and measuring resource. Is that resource calibrated? Was that resource tested for suitability? If the problem is about calibration, I would use clause 7.1.5. If the problem is about not testing suitability, is about not validating the use of the machine, I would use clause 8.5.1 b). 

- Article - Seven Steps for Corrective and Preventive Actions to support Continual Improvement - https://advisera.com/9001academy/blog/2013/10/27/seven-steps-corrective-preventive-actions-support-continual-improvement/
- Article - How to use root cause analysis to support corrective actions in your QMS - https://advisera.com/9001academy/blog/2016/03/01/how-to-use-root-cause-analysis-to-support-corrective-actions-in-your-qms/
- Enroll for free in 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/