Circling Back

Article

Moen, Ronald D.; Norman, Clifford L.   (ASQ)   Associates in Process Improvement, Georgetown, TX

Quality Progress    Vol. 43    No. 11
QICID: 31281    November 2010    pp. 22-28
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Article Abstract

W. Edwards Deming developed the Deming cycle, or Deming wheel, in 1950. He evolved it into what he started calling in the 1980s the plan-do-study-act (PDSA) cycle or the Shewhart cycle for learning and improvement. He strongly objected to conflating the PDSA cycle with the Japanese plan-do-change-act or PDCA cycle, which he saw as a corruption. While the PDCA cycle has been largely unchanging since the 1960s, a number of significant refinements to the Deming cycle have been introduced, including the addition of a model for improvement to guide all four steps of the cycle.

Keywords

Deming philosophy, W. Edwards Deming, Improvement, Plan-Do-Check-Act (PDCA) cycle, Shewhart control chart, Walter A. Shewhart


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