Correction and corrective actions are taken post any event.
Correction is an immediate fix.
Corrective action is taken to eliminate the current problem... by fixing it
a better example-(taken from Google )
You are walking on the road & find a banana skin on the road.
Correction: jump across the banana skin or change the direction of walk.
Corrective Action: throw the Banana skin to the waste bin so that next time u walk in, u don't fall as the cause itself is eliminated.
So... Correction is.. you fix the problem right away.. but the problem(Banana) somewhere still exists.
In corrective action you see to that the problem(Banana) doesnt exist at all anymore.
"The most wasted of all days is one without laughter."
-e e cummings