Which action would best indicate that a corrective action is effective after it has been implemented?

• A. The corrective action resolved the issue but caused new issues.
• B. The issue remains unresolved after the action.
• C. The action was completed but not verified.
• D. The corrective action resolved the issue and no new issues were introduced.

Answer: (D)

The action is considered effective when the fix resolves the issue and does not introduce any new problems. This shows the root cause was addressed and implemented without creating collateral effects, and it implies proper verification and follow-up to confirm sustained improvement. If the action resolves the issue but brings new problems, it isn’t fully effective because it has introduced additional risk. If the issue remains after the action, there was no successful resolution. If the action is completed but not verified, you don’t have evidence that it worked, so you can’t confirm its effectiveness or its long-term impact. Verification after implementation is essential to ensure the solution truly fixes the problem and doesn’t cause new issues.