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The plan–do–check–act cycle. PDCA or plan–do–check–act (sometimes called plan–do–check–adjust) is an iterative design and management method used in business for the control and continual improvement of processes and products. [1] It is also known as the Shewhart cycle, or the control circle/cycle.
The plan–do–check–act cycle is an example of a continual improvement process. The PDCA (plan, do, check, act) or (plan, do, check, adjust) cycle supports continuous improvement and kaizen. It provides a process for improvement which can be used since the early design (planning) stage of any process, system, product or service.
Walter Andrew Shewhart (pronounced like "shoe-heart"; March 18, 1891 – March 11, 1967) was an American physicist, engineer and statistician. He is sometimes also known as the grandfather of statistical quality control and also related to the Shewhart cycle.
Later the idea seems to have inspired C I Lewis and through him to Shewhart, giving a clear account of evolution period from 17th century. [ 38 ] Deming credits a 1939 work by Shewhart for the idea and over time eventually developed the Plan-Do-Study-Act (PDSA) cycle, which has the idea of deductive and inductive learning built into the ...
Walter A. Shewhart made a major step in the evolution towards quality management by creating a method for quality control for production, using statistical methods, first proposed in 1924. This became the foundation for his ongoing work on statistical quality control.
The cycle of kaizen activity can be defined as: Plan → Do → Check → Act. This is also known as the Shewhart cycle , Deming cycle, or PDCA . Another technique used in conjunction with PDCA is the five whys , which is a form of root cause analysis in which the user asks a series of five "why" questions about a failure that has occurred ...
W. Edwards Deming invited Shewhart to speak at the Graduate School of the U.S. Department of Agriculture and served as the editor of Shewhart's book Statistical Method from the Viewpoint of Quality Control (1939), which was the result of that lecture. Deming was an important architect of the quality control short courses that trained American ...
Further explained on page 20 “from one viewpoint, this is the fundamental ideal of quality the control. Since this approach was introduced to Japan by Dr Deming in 1950, it is also known in Japan as the Deming cycle. Dr Deming himself, however, said that it was Dr Shewhart’s idea and that the diagram should be called the Shewhart Cycle.”