Everything between the readings and the report.
Cpkboard does one job: turn the measurements your shop already takes into control charts, capability indices and a report your customer can check.
The charts your customer's quality engineer expects, with the math they can check.
Textbook formulas from the AIAG SPC and MSA manuals. Every number says which sigma estimate it used.
Variables charts
- X-bar and R (subgroups of 2-10)
- X-bar and S (subgroups over 10)
- Individuals and moving range (I-MR)
Attributes charts
- p and np for defective parts
- c and u for defects per unit
- Variable sample sizes handled
Capability
- Cp, Cpk from within sigma (R-bar/d2)
- Pp, Ppk from overall sigma
- One-sided specs and target values
Rules
- Western Electric rules 1-4 on by default
- Nelson rules optional
- Flagged on the chart and on the board
Histogram and spec
- Bins against USL and LSL
- Out-of-spec readings in red
- Normal curve overlay
Gage R&R (Pro)
- Crossed, average and range method
- %GRR, %EV, %AV, %PV, ndc, % of tolerance
- Type 1 gage study
One row per feature. The Cpk that goes on the PPAP, right there.
Jobs, parts, features
Organized the way your travelers are.
Live as readings land
Paste today's subgroup and the point appears.
Green, amber, red
Cpk at or above 1.33, between 1.0 and 1.33, or below.
Copy to the next revision
Spec, subgroup size and rules carry over.
Paste it, upload it, or let the folder do it.
Paste from anywhere
Excel, a text file, the data collector's screen.
CSV and Excel uploads
Zeiss CALYPSO, Mitutoyo MCOSMOS, PC-DMIS exports.
Watched folder (Pro)
New exports chart themselves, no clicking.
Skipped cells shown
Non-numeric cells are counted and listed, never silently dropped.
Characteristic→Feature nameActual→ReadingNominal→NominalUpperTol→USLLowerTol→LSLDateTime→Measured atOperator→OperatorComment→SkipSend the chart. Keep the data.
Your logo and job number
PDF, or a link that opens on a phone.
Formulas on the page
Cpk from R-bar/d2, Ppk from overall s, constants named.
Readings behind each point
Click a point to see its subgroup.
CSV export, anytime
Every reading and chart leaves with you if you leave.
Cpkboard sticks to charts, capability and gage studies.
So you know before you sign up.
Designed experiments and regression
Keep Minitab or JMP for DOE, regression, ANOVA and reliability work.
A full QMS
No document control, CAPA or supplier audits. Cpkboard plugs into the QMS you have with its exports.
Validated medical-device software
We don't claim 21 CFR Part 11 compliance. If you need it, you need a validated system.
Put your first feature on the board tonight.
Create your account in two minutes. Paste last week's readings or send us a CMM export, and the chart and Cpk your customer asked for are ready to send.