Capability position
Record a reading
One row per measurement of one characteristicFilters
Applied to every screen, the report and the CSVMeasured readings
No readings recorded yet. Add one on the left, import a spreadsheet from the toolbar, or load the sample study from the Settings tab.
Headline figures
Distribution of the readings against the specification
Nine equal bins across the range — the shape the indices assume is normalEvery reading in sample order
Plotted as the difference from the mean, so the movement is visibleThe capability indices side by side
Overall indices from the sample standard deviation, within-subgroup indices from the average rangeSubgroup spread, or the specification split
One bar per subgroup when you have grouped the readings; otherwise how many fell in and out of specificationCapability summary
Every figure this study produces, with the arithmetic behind itReadings
Every measurement as it was recorded, in sample orderSettings
Currency, dates and the rules this tool appliesReport header
Appears on the printed reportYour data
Stays on this computerRecords and settings are stored in this browser only. Use Export .json for a backup you can archive or move to another machine, and Import .json to restore it. Reset asks twice, then erases everything.