The final rule to the US QMSR (revising 21CFR820 by referencing ISO 13485:2016) provide a lot of insight into FDA's current thinking. For example, the following statements are interesting: "Nonconforming product discovered before or after distribution should be investigated to the degree commensurate with the significance and risk of the nonconformity, consistent with Clause 8.3 of ISO 13485 and its subclauses. At times an in-depth investigation will be necessary, while at other times a simple investigation, followed by trend analysis or other appropriate tools will be acceptable. Consistent with Clauses 8.2.5 and 8.2.6 of ISO 13485, among other things, the requirement for measurement and monitoring applies to process and quality system nonconformities, as well as product nonconformities. For example, if a molding process with its known capabilities has a normal 5 percent rejection rate and that rate rises to 10 percent, an investigation into the nonconformance of the process must be performed."
I strongly recommend reading the final rule!
Senior Laboratory Expert -Device Development bei Boehringer Ingelheim
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