Shewhart coined the term PDCA; plan, do, check and act which was modified by Deming to PDSA; plan, do, study and act.
Is PDCSA more appropriate in the present day world?. We plan things, do things as per the plan, check to see the status, and then study. That is exactly what happened in todays retrospective meeting I attended. We studied the burn down chart for potential learning opportunities.