Temporary VS Permanant
Al (and Carol too really): Temporary Corrective Action - We are human and even though you may have a good procedure in place...folks tend to get away from all the details if/when they rely on their memories rather than the provided reference documentation. If this is the reason bad product got out the door (rather than insufficient process) to us that calls for temporary corrective action measures. To us this is short term additional inspection requirements, monitoring of product or process by a third party to ensure process (currently in place) is followed all the time, etc...
Permanant Corrective Action - When we actually change the process, equipment, requirements, documentation, etc...
MDR for us is a Material Discrepancy Report. This is used internally only and how we track all material nonconformity issues regarless of Corrective Action (temp or perm) or just BS Customer Returns (product tests fine - but close to the 1 yr mark sitting in their warehouse...you know the political/scratch-my-back sales game).
A RCA is only generated for permanant Corrective Actions and is ultimately the call of the QA Manager although the information is reviewed by Engineers, Material Mgmt, and Mfg folks along with QA and the input reviewed by the QA Manger. Issues taken up with Plant Mgr if there are dissagreements on how it should be handled (very rarely needed).
Carol: Hard and fast guidelines for us is the 'rule-of-thumb' as I have stated in this post. Basically, if the root cause is training (aka - human error) issue rather than a failure of the process or equipment, we don't write it up as a corrective action.
Also, here is another snippet:
1.1 The purpose of this document is to ensure that timely and effective corrective or preventive action is taken to prevent, reduce, or eliminate non-conformances which degrade the quality and value of the product.
1.2 Request for Corrective/Preventive Action may be initiated as a result of nonconformities relating to process and product, audit findings, improvement teams, management review meetings, or review of standard quality records.