Must divide the included count evenly. Uses within-subgroup σ (R̄/d2).
Subgroups are formed in paste order — use data sampled in rational subgroups for Cp/Cpk to be meaningful.
Default is individuals → Pp / Ppk (overall σ); check subgroups for Cp / Cpk (within σ). The mean drives every index; the median is a skew check only. All statistics are computed by the same engine that ships inside Phase Gate Manager — nothing is uploaded, everything runs in your browser.
Per page
⚠ These studies are not saved — they live only in this session. Print or Save as PDF before you leave, or they're gone when you close the tab.
Each printed page holds the number of studies you select above (landscape Letter). Generated by Phase Gate Manager.