I have studied and applied several leading statistical software applications over the last 9 years. I have instructed statistics to hundreds of Black Belts. I always launch SPCXL first. It is the easiest statistical software to use, and has met 99 percent of my statistical needs. If ‘lean’ is about delivering the greatest customer value per dollar, SPCXL wins.

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Thomas C. Stroup, P.E. Lean Six Sigma Black Belt, Lockheed Martin Inc.