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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.
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 learning and improvement cycle. Deming finally published the PDSA cycle in 1993, in The New Economics on p. 132. [39]
PDCA — plan, do, check, act cycle for quality control purposes. (Six Sigma's DMAIC method (define, measure, analyze, improve, control) may be viewed as a particular implementation of this.) Quality circle — a group (people oriented) approach to improvement.
The Plan-Do-Check-Act (PDCA) cycle, often referred to as the Deming Cycle, is a scientific method for testing concepts and putting changes into action that helps make better decisions. The focus on small-scale plan testing initially, which lowers the possibility of broad problems and encourages fault avoidance, is what distinguishes PDCA.
It can be seen that both fit into the PDCA (plan-do-check-act) philosophy as determined by the Deming-Shewhart cycle. Investigations to root cause may conclude that no corrective or preventive actions are required, and additionally may suggest simple corrections to a problem with no identified systemic root cause.
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During the "check" stage, performance is monitored and periodically measured to ensure that the organization's environmental targets and objectives are being met. In addition, internal audits are conducted at planned intervals to ascertain whether the EMS meets the user's expectations and whether the processes and procedures are being ...
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