Containment protects the customer by isolating suspect product. Correction fixes the specific nonconformity, for example by reworking or replacing a part. Corrective action removes the root cause so the problem does not come back. The root cause is the underlying reason the problem happened. Most rejected 8Ds and audit responses mix these up.
The four terms side by side
| Term | What it does | Example: wrong label shipped |
|---|---|---|
| Containment | Stops suspect product reaching the customer while you investigate. | Hold and sort all stock with that label, at the customer and in your warehouse. |
| Correction | Fixes the nonconformity that was found. | Relabel the affected parts. |
| Root cause | The underlying reason the problem happened. | Label templates for two similar part numbers sat side by side with no check at print. |
| Corrective action | Removes the root cause so it does not recur. | Labels print from the scanned work order, so the wrong template cannot be selected. |
ISO 9000 defines correction as action to eliminate a detected nonconformity, and corrective action as action to eliminate the cause of a nonconformity and prevent it recurring. Containment is how automotive problem solving names the immediate protection step.
How to tell which one you wrote
- Would the problem come back if you stopped doing it? If yes, it is containment, not corrective action. Sorting and extra inspection fall here.
- Does it fix this part or this record only? That is a correction.
- Does it change the process, the system or the design? That is corrective action.
- Can you turn the cause on and off? If you cannot verify it, it is a suspected cause, not a root cause.
Why audit responses get rejected
A common pattern: the finding is a missed calibration, and the response is "calibrated the gage." That is a correction. The auditor wants to know why the calibration system missed it, and what changed so it cannot happen again with any gage.
Questions people ask
Is 100% inspection a corrective action?
Usually not. It contains the problem and can catch defects, but the cause is still there. Treat it as containment until a real corrective action is validated.
Is retraining a corrective action?
Only rarely. If the cause was a missing or wrong instruction, fixing the instruction is the corrective action. Retraining alone assumes people will not make the same mistake again.
Do I need both correction and corrective action?
Usually yes. Fix what was found, then fix why it happened. Audit responses are expected to address both.