How do you distinguish correction, corrective action and preventive action?

Short answer

A correction fixes a detected problem now. Corrective action addresses the cause of an actual problem so it is less likely to recur. Preventive action targets the cause of a possible problem before it occurs. Each serves a different purpose, even when they are managed in the same quality system.

Why

Think in three layers. Correction restores the immediate situation, such as segregating mislabeled material or repairing an incorrect record according to procedure. Corrective action asks why the mistake occurred and modifies the underlying system.

That might mean redesigning a label verification step or fixing confusing software defaults, followed by effectiveness monitoring. Preventive action uses trends, risk assessments or lessons from other processes to remove a similar vulnerability before it produces a failure. A sound CAPA record connects the observed risk or nonconformity to investigation findings, action owners, due dates and measurable checks.

Training may be appropriate but should not be the reflexive answer when poorly designed controls are the actual problem. Regulatory systems differ in wording and workflow, so the local approved procedure remains important.

An example

A mislabeled sample is quarantined as the immediate correction. Scanner logic is modified as corrective action. A similar labeling workflow in another department is assessed preventively.

Common mistakes

Calling all three steps CAPA without distinguishing their purpose or measuring effectiveness only by whether tasks were completed

The interviewer might ask next

Which evidence would convince you that your corrective action really reduced recurrence?