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A quality engineer at an automotive parts plant monitors the lengths of camshafts. Three machines manufacture camshafts for three shifts each day. The engineer measures five camshafts from each machine during each shift.
You can use this data to demonstrate Xbar-R Chart and other analyses that compare multiple time series variables.
You can create three control charts with this data to monitor each machine.
| Worksheet column | Description |
|---|---|
| Machine 1 | The length of the camshafts from Machine 1 |
| Machine 2 | The length of the camshafts from Machine 2 |
| Machine 3 | The length of the camshafts from Machine 3 |
| Subgroup ID | The subgroup identification number |
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