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| articles:pdca-the_origin [2022/09/27 10:12] – [PDCA - The Origin Myth] rrandall | articles:pdca-the_origin [2022/11/24 09:39] (current) – [The Deming Cycle (1950)] rrandall |
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| {{ :articles:shewhart-5_steps_in_the_operation_of_control.png?direct&600 |}} | {{ :articles:shewhart-5_steps_in_the_operation_of_control.png?direct&600 |}} |
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| Upon reading the source materials, we recognize that it is quite a //stretch// to cite the PDCA as the same as the "Shewhart Cycle". Rather than a basis for continual/continuous improvement, Shewhart's "cycle" would be better described as a "closed-loop" self-correcting system intended to achieve "optimization" of a process | Upon reading the source materials, we recognize that it is quite a //stretch// to cite the PDCA as the same as the "Shewhart Cycle". Rather than a basis for continual/continuous improvement, Shewhart's "cycle" would be better described as a "closed-loop" self-correcting system intended to achieve "optimization" of a process __using a "Control Chart"__. |
| ===== The Deming Cycle (1950) ===== | ===== The Deming Cycle (1950) ===== |
| {{ :articles:1950_deming_cycle_transparent.png?direct&350|Deming Cycle introduced in 1950}} | {{ :articles:1950_deming_cycle_transparent.png?direct&350|Deming Cycle introduced in 1950}} |
| Inspired by the "Shewhart Cycle", W. Edwards Deming created his own "Deming Cycle", which he introduced in 1950 at a [[http://juse.or.jp/english/|"Japanese Union of Scientists and Engineers" (JUSE)]] sponsored eight-day seminar on statistical quality control for managers and engineers. His straight-line: Step 1- "Design", Step 2 – "Produce", Step 3 - "Sell" was converted to a circle with a fourth step added: Step 4 - "Redesign through marketing research". | Inspired by the "Shewhart Cycle", W. Edwards Deming created his own "Deming Cycle", which he introduced in 1950 at a [[http://juse.or.jp/english/|"Japanese Union of Scientists and Engineers" (JUSE)]] sponsored eight-day seminar on statistical quality control for managers and engineers. His straight-line: Step 1- "Design", Step 2 – "Produce", Step 3 - "Sell" was converted to a circle with a fourth step added, and Step 4 - "Redesign through marketing research". |
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| Deming stressed the importance of constant interaction among design, production, sales, and research and that the four steps should be rotated constantly, with quality of product and service as the aim. | Deming stressed the importance of constant interaction among design, production, sales, and research and that the four steps should be rotated constantly with the quality of product and service as the aim. |
| - Design | - Design |
| - Produce | - Produce |
| - Redesign through marketing research | - Redesign through marketing research |
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| | <note>One could argue that Deming should have described the "Deming Cycle" as having 3 steps since Step 4 rolls into Step 1 again for the "cycle".</note> |
| ===== The "Deming Wheel" - created by Japanese executives (1951) ===== | ===== The "Deming Wheel" - created by Japanese executives (1951) ===== |
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