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The Normality Myth

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The oldest myth about process behavior charts is the myth that they require “normally distributed data.” If you have ever heard this idea, or if you have ever taught this to others, then you need to read this article.

The Pickleball Serve and Theories of Variability

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Credit: Michael & Sherry Martin

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Pickleball is arguably the fastest-growing sport in the United States, especially among baby-boomer retirees.

‘Any Theory Is Correct in Its Own World...

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As statistical methods become more embedded in everyday organizational quality improvement efforts, I find that a key concept is often woefully misunderstood, if it is even taught at all. W.

Understanding Capability of Production Processes and Measurements

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In a general sense, capability is the ability to do something. Within manufacturing, capability is given a much more specific definition. It is an expression of the accuracy of a process or equipment, in proportion to the required accuracy.

Avoiding Bias Correction Confusion

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Recently I have had several questions about which bias correction factors to use when working with industrial data. Some books use one formula, other books use another, and the software may use a third formula. Which one is right?

Using Control Charts in Software Applications

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Whatever the process or type of data collected, all data display variation. This is also true in software development.

Analysis of Means Techniques

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During the past three months James Beagle and I presented columns that made extensive use of analysis of means techniques.

Predicting the Next Stock Market ‘Flash Crash’

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Soon after the Great Recession, the U.S. stock markets plunged—and rebounded within 36 minutes.

Why Use Control Charts?

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In everyday language, “in control” and “under control” are synonymous with “in specification.” Requirements have been met. Things are OK. No trouble.

Introducing the AIAG-VDA DFMEA

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During the early 1980s, GM, Ford, and Chrysler established the Automotive Industry Action Group (AIAG), a not-for-profit organization with the mission “To improve its members’ competitiveness through a cooperative effort of North American vehicle manufacturers and th

Pagination

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