I-MR Analysis · Six Pack
Individual and Moving Range with histogram and full capability summary. Capability and stability in a single view — fast for small samples.
Statistical Process Control
Process behaviour, capability, and rule violations — all in one place.
Sigmafy ships with a serious SPC tool-set. Five chart types, Nelson rules, capability metrics, and a personal chart library you can reuse inside projects.
I-MR
X-bar R
P-chart
Nelson rules · 0 violations
1.42
Cp
1.21
Cpk
128
PPM
99.4%
Yield
Live capability
Tools
Two complementary tools — pick the right one for the job.
Stats Analysis · Super-app
A full SPC workbench: I-MR, X-bar R, X-bar S, U-chart and P-chart. Nelson rules surfaced inside the chart, not buried in a sidebar.
Capabilities
What you can do.
I-MR · X-bar R · X-bar S
The core SPC chart families for variable data, sized for the sample size you actually have.
U-chart & P-chart
Attribute charting for defects per unit and proportion non-conforming, with auto-calculated control limits.
Nelson rules
Eight Nelson rules detected and flagged in the chart — every violation linked back to the offending sample.
Capability metrics
Cp, Cpk, Pp, Ppk, yield, PPM. Spec limits and target captured per study.
User chart library
Save any chart to your personal library, name it, attach metadata and reuse it inside a project.
Embedded in projects
Charts created in the SPC tools become evidence in project topics — no copy-paste, no broken images.
Try the SPC suite on your own dataset.
The quickest way to evaluate is to load real samples. We'll walk you through it.