English: Plan-Do-Check-Act Deming circle, also known as the Shewart cycle, since Deming claimed he took the idea from him. Later Deming changed it to be Plan-Do-Study-Act, but the first version seems more popular and has become the defacto standard.
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{{Information |Description={{en|'''Plan-Do-Check-Act Deming circle''', also known as the ''Shewart cycle''', since Deming claimed he took the idea from him. Later Deming changed it to be ''Plan-Do-Study-Act'', but the first version seems more popular and