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Insights on statistical process control, quality engineering, and data-driven manufacturing

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Small Sample Capability: How to Trust Cpk With Only 10 Parts

With a small sample of 10 parts, traditional Cpk has a confidence interval 0.6 units wide — your 1.38 could be anywhere from 1.05 to 1.71. Entropy-based methods extract more from limited data without the normality assumption.

small-sample-statistics process-capability confidence-intervals sample-size-determination statistical-concepts

Mar 7, 2026·Alex Dyba