Improve When the inspection was to look again to see if there are any parts that should be revised. If that's not good enough until we have adapted the work is satisfying, which is the last step
Improvement. When it works, it explores the monitoring view, again, to see if there are any steps to improvement. If that is still not good enough, adjust, modify, until you get satisfactory results, which is the last step
When it works, and then it was revised survey have a look again to see if there are any part at any revision should be if you saw that it was good enough to not modified until it is satisfied that the work is the last step