PDCA (plan-do-check-act) is a repetitive four-stage model
for continuous improvement (CI) in business process management.
The PDCA model is also known as the Deming circle or
Shewhart cycle. PDCA was popularized by Dr. W. Edwards Deming, an American
engineer, statistician and management consultant. Deming is often considered
the father of modern quality control (QC). Deming's theories form the basis for
TQM (Total Quality Manangement) and ISO 9001 quality standards. Deming himself
credited Walter Andrew Shewhart as the creator of the cycle, however. Shewhart
was an American physicist, engineer and statistician who is often considered
the father of statistical quality control.
Here's an example of how PDCA is broken down in TQM :
Plan: Define the problem to
be addressed, collect relevant data, and ascertain the problem's root cause.
Do: Develop and implement a
solution; decide upon a measurement to gauge its effectiveness.
Check: Confirm the results
through before-and-after data comparison.
Act: Document the results,
inform others about process changes, and make recommendations for the problem
to be addressed in the next PDCA cycle.
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