Effectiveness of the corrective actions

Answer:

The purpose of the corrective action is to remove the cause of the nonconformity and prevent it from happening again. If the corrective action managed to achieve this, than it is considered as effective. For example, if corrective action process determined that the cause of the nonconformity was lack of training and you perform training as a corrective action, if the nonconformity is not recurring, than the corrective action was effective.

For more information, see: Using corrective actions to eliminate nonconformities and drive health & safety improvements https://advisera.com/18001academy/blog/2017/02/15/using-corrective-actions-to-eliminate-nonconformities-and-drive-health-safety-improvements/