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Walter Shewhart, who developed Control Charts at Bell Labs in the 1920s, used those charts to distinguish between 2 types of variation. He saw that all processes showed signs of Common Cause variation, but processes that were not in control…
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Elisabeth Swan

Elisabeth is a Managing Partner at GoLeanSixSigma.com, the co-author of The Problem-Solver’s Toolkit and co-host of the Just-in-Time Cafe. For over 25 years, she's helped leading organizations like Amazon, Charles Schwab and Starwood Hotels & Resorts build problem-solving muscles with Lean Six Sigma to achieve their goals.