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They both come from the scientific method. I have found that folks with Lean roots will select PDCA and A3. Folks with Six Sigma roots usually select DMAIC. Again, two schools of thought that have a lot of similarities. Often an organization will decide which approach they want all employees to follow and train their employees on what they choose. Not only do these methods help organizations, but it’s also providing a common language.

Elisabeth Swan

Elisabeth is a Managing Partner at 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.