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

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Process Drift Detection Without False Alarms

Process drift hides under false alarms. Shewhart charts catch sudden shifts but miss gradual process drift — while Nelson rules fire on stable data. Entropy-based homogeneity testing separates real drift from noise without chart configuration.

process-drift process-stability control-charts homogeneity-testing

Mar 12, 2026·Alex Dyba

Hidden Clusters in Your Process Data — and Why Cpk Hides Them

Hidden clusters from multi-cavity molds, shift changes, and material lots produce aggregate Cpk that looks capable — while one subpopulation ships defects. ELDF detects what Cpk can’t see.

cluster-detection eldf homogeneity-testing subgroup-analysis entropy-methods

Mar 11, 2026·Alex Dyba