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I would like to set up control charts for some of our processes. From each run, one wafer is taken and analyzed on five positions of the wafer. How should I interpret this sampling scheme: as one sample (I-MR) or as five samples (Xbar-R)? Thank you for your question.  It is one that many people…
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Craig Tickel

Craig is a Senior Consultant at and a Master Black Belt with over 25 years of success working with companies like Procter & Gamble, Johnson & Johnson, General Electric, Starwood Hotels & Resorts and Stepan Company. He’s an expert at helping people learn and apply Lean Six Sigma to achieve their goals.