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Tee Guidotti, Saudi Arabia
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Deming Cycle is a Spiral
I like to conceptulaize the Deming cycle as a spiral, moving outward with each full turn, rather than a circle coming back to the same point. The idea is that improvement opens new space and leads to further improvement. The idea of a wheel rolling uphill with a backstop does not do it for me.
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Hubert Roigt, Madagascar
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Deming Wheel as a Spiral I completely agree with the spiral model of Deming cycle. This way better shows the idea of continuous improvement than the simple wheel.
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R Hallagan, United States
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The Backstop of the Deming Cycle Tee, regarding your comment on your (natural) uncomfortableness with "the idea of of a wheel rolling uphill with a backstop," I think Deming is making an intentional, important point. When introducing improvements, human nature is such that old practices and habits will quickly resume if you take your eye off the gains. Part of "securing improvement" is to stay with the gains until wholesale new habits have replaced old habits.
There is also an element of wisdom to keeping guard against "Murphy's law".
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sara, Iran
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Spiral PDCA Resources Who can contribute some resources about spiral PDCA? And recommend some researches or articles that study it rigidly? Regards.
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Winand Kissels
Interim Manager, Netherlands
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Deming Cycle as a Spiral Completely right: The Deming Cycle is really a spiral. Always take time into account. Whenever you have completed a cycle, time has elapsed and your internal and external settings have changed. You won't be able to do the same cycle again.
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David Wilson
Manager, Canada
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PDCA - Toyota Kata Mike Rother's book 'Toyota Kata' (2010) identifies how continuous improvement, problem solving and adaptation can be effective in moving from a 'current condition' to a 'target condition'. Mike shows how continuous improvements using the PDCA "cycle" works. It is a spiral, but it can also be viewed as a staircase, where every step is a cycle from the current to the target condition. See page 145.
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