Histogram
Where do the seat readings sit against 32 µin?
Past 32 µin: 33, 35.
How this sheet sits with the others
The readings are binned by 3 µin from 15 to 36, with the spec line at 32. The mean is 24.54. Two readings, 33 and 35, sit past the spec. Without time order, the histogram cannot show whether the process was stable.
- What it makes visible
- The Ra readings in bins of width 3 from 15 to 36, against the spec at 32.
- When it is useful
- When the team needs the shape of the readings before it talks about capability.
- Who uses it
- Priya Shah’s seat-face measurements.
- What it takes
- The Ra readings in the sample.
- What it leaves
- A mean of 24.54 µin, and two readings, 33 and 35, past the spec at 32.
- The underlying record
- Seat-face Ra readings against Ruth Adeyemi's 32 µin limit, including the two that sit past it, are the same readings the gage, the capability arithmetic, and the reject chart are arguing about.
Where these facts go next
What this sheet still leaves out
It has no time order, so a stable process is assumed, not shown.