Tools for Lean Six Sigma |
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Jay Arthur
Copyright © 2011
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| Type of Data | Examples | Charts |
| Variable | time, height, length, width, weight, money | XmR, XbarR, XbarS |
| Attribute | number of people, complaints, defects, missed commitments, repair reports, etc. | c,np,p,u |
| Sample Size | Chart Type |
| One | Use the XmR Chart |
| 2-10 | Use the XbarR Chart |
| 11-25 |
| Sample Size | Chart Type |
| Constant (same) | Use the "np" Chart |
| Varies | Use the "p" Chart |
| Sample Size | Chart Type |
| Constant (same) | Use the "c" Chart |
| Varies | Use the "u" Chart |
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