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Technical articles and insights on NEXSPC and Statistical Process Control (SPC).

Keyword "SPC sampling" found 1 articles (current page)

Why Does SPC Sampling Insist on Exactly 25 Subgroups?

2026-03-15 01:37

Discover the hidden mathematical and engineering logic behind the golden rule of using 25 subgroups in SPC and CPK analysis. Learn how it perfectly balances statistical accuracy with real-time anomaly traceability…

SPC sampling 25 subgroups Statistical Process Control CPK analysis Process Capability Control Charts Quality Management Root Cause Analysis

Why Does SPC Sampling Insist on Exactly 25 Subgroups?