Pareto Chart
Pareto charts may be used to visualize the distribution of Defects across various facets, like Traceability, Parts, or Processes. This chart is named after the Pareto Principle.
Settings
| Setting | Description |
|---|---|
| Label | The title to display on the chart. |
| Script ID | Identifies how this chart is referenced in Dashboard Scripts. |
| Group By | Controls how the data is grouped on each chart. Each separate group will be drawn as a separate bar on the same chart. |
| Split By | Controls how the data is split into multiple charts. One chart will be drawn for each unique grouping. |
| Pareto Bar Method | Controls the method used to display the bars. See Bar and Line Methods for more information. |
| Line Method | Controls the method used to display the cumulative line. See Bar and Line Methods for more information. |
| Hide Empty Bars | Whether to hide bars with a value of zero. |
Bar and Line Methods
Pareto bars can be based on either Defects or Non-Conforming Units (NCUs).
| Method | Bar Description | Cumulative Line |
|---|---|---|
| Count | The count of Defects. | Determined by the Line Method property. Percent of Defects: The percentage that each bar contributes to the sum of Defects across all records in the data set. Percent of Sample Size: The percentage that each bar contributes to the total Sample Size. |
| Cost | The total cost of Defects. | The percentage that each bar contributes to the sum of costs across all records in the data set. |
| DPM PPM |
The number of Defects per million units produced. | None |
| Cost Per Unit | The bar's total cost divided by the sample size of the bar. | None |
| Sigma | The Defect Sigma for this group, based on the DPM/PPM. | None |
Drilldown
Additional analysis may be performed by clicking on a bar, then selecting a another category to drill into. This will visualize the Defects within that bar, grouped by a chosen Traceability, Part, Process, Location, or Test Label.
This process may be repeated as many times as desired to determine the largest source of Defects.
The drilldown is not saved with the chart, and will need to be repeated each time the Dashboard is loaded.
The drilldown may be exited by using the select box in the bottom of the Pareto chart.
Customization
Pareto charts may be customized in various ways with scripting. Some common customizations of Pareto charts include:
- Changing the bar colors.
- Modifying the cumulative line.
- Adding comparison bars.
Customizing a Pareto Chart will disable the ability to drill into it.
Download
Charts may be saved as an image for offline use by clicking the Download button. If multiple charts have been drawn, they may be downloaded individually using the dropdown menu.
Insights
Pareto Insights may be used to reduce the manual work required to determine the cause of Defects. See Using Insights for more information.
