This may be a unique concept or just my weird way of looking at it. Probably, the latter.
I profess that I learned this lesson two ways and applied it well as a manager.
Discipline is derived directly from the Latin, disciplīna meaning instruction given, teaching, learning, knowledge or from discipulus, meaning pupil. The English word is too commonly used to describe punishment. Pity they miss the point.
PDCA has saved millions of dollars providing process improvement, primarily, to the commercial transportation, trucking and logistics industry. From basic to expanded engineering services, PDCA has formulated and implemented strategic and tactical plans in Fortune 100, Internet startup and entrepreneurial companies, among others. As a result productivity, profit, capacity, quality and the customer experience improves, while costs drop.