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articles:pdca-how_we_miss_shewarts_point [2021/07/10 14:05] – [The Deming Cycle] rrandall | articles:pdca-how_we_miss_shewarts_point [2021/07/10 15:06] – [A Major PDCA / PDSA Cycle Obstacle] rrandall | ||
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{{ : | {{ : | ||
- | + | So how did the " | |
- | ===== The Deming Cycle ===== | + | ===== The Deming Cycle (1950) |
Inspired by the " | Inspired by the " | ||
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- Re-design the product, in the light of consumer reactions to quality and price. Continue around and around the cycle. | - Re-design the product, in the light of consumer reactions to quality and price. Continue around and around the cycle. | ||
- | ===== The Deming Wheel ===== | + | ===== The Deming Wheel (1951) |
- | After Deming' | + | Impressed with Deming' |
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|4. Research | = Action |In case of a complaint being filed, it has to be incorporated into the \\ planning phase, and action taken for the next round of efforts| | |4. Research | = Action |In case of a complaint being filed, it has to be incorporated into the \\ planning phase, and action taken for the next round of efforts| | ||
- | The resulting PDCA cycle is shown in Figure 6. The four-step cycle for problem-solving includes | + | The four-step cycle for problem-solving includes: |
+ | - Planning | ||
+ | - Doing (implementing), | ||
+ | - Checking | ||
+ | - Action | ||
{{ : | {{ : | ||
+ | The PDCA cycle emphasized the prevention of error recurrence by establishing standards and the ongoing modification of those standards. Even before the PDCA cycle is employed, it is essential that the current standards be stabilized. The process of stabilization is often called the SDCA (standardize-do-check-action) cycle. | ||
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+ | ===== Using the PDCA Cycle for Improvement ===== | ||
+ | |||
+ | By the 1960’s the PDCA cycle was being used in Japan as an improvement cycle and a management tool. Lilrank and Kano state in their 1989 book "// | ||
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+ | ===== The Deming PDSA Cycle (1986) ===== | ||
+ | |||
+ | In 1986, Deming reintroduced his " | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | In his 4-day seminars during the 1980’s, Deming presented this version. Also, he warned Western audiences that the plan, do, check, and act version is inaccurate because the English word “check” means “to hold back.” Deming stated in the Moen, Nolan, and Provost manuscript, “//... be sure to call it PDSA, not the corruption PDCA//.” | ||
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+ | For a more detailed article on the history of PDCA / PDSA, read: {{ : | ||
+ | ===== A Major PDCA / PDSA Cycle Obstacle ===== | ||
+ | |||
+ | A major obstacle for users of the PDCA / PDSA Cycle concept is observed when encountering a " | ||
+ | |||
+ | A Technical Contradiction is a situation that emerges when an attempt to improve a certain attribute (parameter) of a system leads to an unacceptable degradation of another attribute (parameter) of the same system. | ||
+ | |||
+ | The Soviet inventor and science-fiction author Genrich Altshuller (1926-1998) and his colleagues, began developing the concept of TRIZ (Teoriya Resheniya Izobretatelskikh Zadatch), typically translated into English as the " | ||
+ | By 1969, Altshuller had reviewed about 40,000 patent abstracts in order to find out in what way the innovation had taken place and developed the concept of technical contradictions, | ||
+ | Lacking knowledge of TRIZ can result in a recurring exercise in futility... leading to users constantly "// | ||
+ | To learn more about TRIZ and the 40 TRIZ Principles, explore the [[https:// | ||