I recently completed an internal process audit. A certified operator did not complete all required Control Plan quality checks and was not able to complete certain measurement checks/did not know how. I deemed that work order as suspect product and informed the quality manager as well as the manufacturing manager. The QM stated she would take care of the issue by quarantining the product. I decided to audit the control of suspect product. The QM never quarantined the product and it made it to the customer. At that point I stated she had to contact the customer and that the process of control of suspect product failed. Customer was never notified. During the same audit a temporary operator made product with no oversight - could not answer any questions related to the Control Plans - that also became suspect product. Same outcome - no reaction from the quality manager or operations manager and that customer was never notified as well. I was blamed for not quarantining product even though I was the auditor and I informed the correct parties - quality manager and manufacturing manager. Any thoughts?