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A3 problem-solving is a methodology to conduct root cause analysis. Specifically, A3 is the name of an 11 x 17 piece of paper, the international paper size. This document size is typically used to document the process, and where the name of the tool came from.

Tracy O'Rourke

Tracy is a Managing Partner & Executive Advisor at 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.