Question: Six-sigma quality (optional). A process with Cp 2 is sometimes said to have six-sigma quality. Sketch the specification limits and a Normal distribution of
Six-sigma quality (optional). A process with Cp ≥ 2 is sometimes said to have “six-sigma quality.” Sketch the specification limits and a Normal distribution of individual measurements for such a process when it is properly centered. Explain from your sketch why this is called six-sigma quality.
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