| Location | Cause and Solution |
| No data to display | The grid is empty, or no properties have been selected. |
| Inadequacy of the Law | Change the law, or look for a mixture of populations: a histogram with two peaks is not a single distribution. |
| Cp is much greater than Pp | The process is veering off course. This is a management issue, not a technical capability issue. |
| All out-of-range points on an attribute map | Probable overdispersion in large batches: switch to a P’Laney or U’Laney plot. |
| Missing Capabilities | Tolerances are not specified for the characteristic. |
| The histogram is correct, but the map is distorted | Look at the timeline: instability isn't visible in a distribution. |
Messages and Special Cases
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