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What are the 5 Whys?

5 Whys is a simple but effective method of analyzing and solving problems by asking “why” five times, or as many times as needed, in order to move past symptoms and determine root cause. This approach is used in tandem with Cause-and-Effect or Fishbone Diagrams.

5 Whys & Fishbone Diagram Training - GoLeanSixSigma.com

5 Whys & Fishbone Diagram Training
Single Module

For a better understanding of the 5 Whys and an overview of Lean Six Sigma, check out our 5 Whys & Fishbone Diagram Training!


To learn how to use the 5 Whys and how to apply Lean or Six Sigma, check out our free Lean Six Sigma Yellow Belt TrainingGreen Belt Training or Lean Training.

Tracy O'Rourke

Tracy is a Managing Partner & Executive Advisor at GoLeanSixSigma.com. She is also a Lean Six Sigma Green Belt Instructor at University of California San Diego and teaches in San Diego State University’s Lean Enterprise Program. For almost 20 years, she has helped leading organizations like Washington State, Charles Schwab and GE build problem-solving muscles.