PDCA - where does it come from?

Deming Cycle, PDCA

The Deming Cycle, or PDCA Cycle is a continuous quality improvement model consisting of four repetitive phases and seven steps for continuous improvement and learning: Plan, Do, Check and Act. The PDCA cycle is also known as the Deming Cycle, the Deming wheel of continuous improvement. Its origin can be traced back to the eminent statistics expert Mr. Walter A. Shewart - in the 1920