Control Chart Generator

Shewhart I-MR and X-bar R charts. Nelson rules (8 tests).
Cp, Cpk, Pp, Ppk when spec limits supplied. PNG export.
Not sure which chart fits? Use the interactive control chart selector.
Ref: AIAG SPC Manual, 2nd Ed. · Nelson (1984) · Western Electric

I Chart Settings

Chart Type

Subgroup Size

USL (optional)

LSL (optional)

Target (optional)

II Data

One value per line, or comma / tab / space separated. Paste from Excel or any column of numbers.

III Control Charts

IV Summary

V Process Capability

VI Nelson Rule Violations

Next step

This is one of the bench instruments, standing alone

The calculator above takes numbers you type, one set at a time. On the bench, the same solver runs against a dataset you keep — versioned, with the conditions held beside the result, so the number can still be explained to someone who asks six months from now.

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