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Y=f(x) means that the Project Y is impacted by factors, x’s, within the process and inputs to the process. This semi-equation is helpful as a way of framing root cause analysis. Once the Project Y is selected, the goal is to understand the major factors, x’s, and make changes to those elements to improve the Y.

To learn how to use the Project Closure Template and how to apply Lean or Six Sigma, check out our Green Belt and Black Belt Training & Certification!

Elisabeth Swan

Elisabeth is a Master Black Belt at, the co-author of The Problem-Solver’s Toolkit and co-host of the Just-in-Time Cafe. For over 30 years, she's helped leading organizations like Amazon, Charles Schwab and Marriott International, Inc. build problem-solving muscles with Lean Six Sigma to achieve their goals.

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