The Pareto Chart Widget Node displays a bar chart combined with a line graph to highlight the most significant contributors in a dataset. It is useful for root cause analysis, identifying the 80/20 distribution, and prioritizing issues or categories.
What Is a Pareto Chart?
A Pareto chart ranks categories from highest to lowest by frequency or impact (typically as bars), and overlays a cumulative percentage line. This visual structure helps identify the “vital few” factors that contribute most to a problem or outcome.
The chart is based on the Pareto Principle, which asserts that roughly 80% of effects come from 20% of causes.
Step-by-Step: How to Configure the Pareto Chart Widget Node
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Add the widget
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Drag the Pareto Chart Widget Node from the Visualizations panel to the canvas.
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Connect the widget to the data source
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Link the widget to the upstream workflow node that emits the field to be counted and categorized.
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The field must match the JSON key to display.
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Open configuration
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Double-click the widget to open the settings window.
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General Settings
| Field | Requirement | Description |
|---|---|---|
| Widget Name* | Required | Title displayed on the widget (e.g., Top 10 Error Types). |
| Widget Subtitle | Optional | A descriptive subtitle under the main title. |
| Show UID / Label Name | Optional | Toggle to display the device UID or label. |
Chart Configuration
| Field | Requirement | Description |
|---|---|---|
| X-axis Title* | Required | Label for the horizontal axis (e.g., Error Type). |
| JSON Key to Display* | Required | The field from the payload to be grouped and counted. |
| Calculation* | Required | Aggregation method (default: Count). |
| Show First X% of Values | Optional | Limit to top contributors only (e.g., top 80%). |
| Calculation Interval* | Required | Time window to calculate results. |
| Time Units* | Required | Units for the interval (e.g., Minutes, Hours). |
| Refresh Interval (seconds) | Optional | How often the chart updates (default: 60s). |
| Decimal Places | Optional | Set number of decimal places for values and percentages. |
Tooltip & Interface Settings
| Field | Requirement | Description |
|---|---|---|
| Enable Tooltip | Optional | Toggle to show tooltips when hovering over bars or line. |
| Tooltip Text | Optional | Custom text to appear in the tooltip. |
| Add to Interface* | Required | Assign the widget to one or more interfaces. |
Grouping & Display
| Field | Requirement | Description |
|---|---|---|
| Select Label | Required (if grouped) | Use a saved label to group by device or category. |
| Grouped Display Mode | Optional | Choose: - No Grouping - Group by Label Value - Group by Label Name |
| Number of Widgets to Display | Optional | Limit how many grouped widgets appear. |
Use Cases
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Identify top contributors to machine downtime
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Analyze most frequent user issues or errors
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Prioritize defect types by impact
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Understand distribution of causes in audits or failures
Best Practices
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Use "Show first X%" to focus on the most important factors
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Match X-axis title clearly to the data field being grouped
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Apply label grouping to perform Pareto analysis per machine or location
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Refresh at an interval aligned with your dataset's update frequency
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Use tooltips to provide insight into cumulative percentages
Frequently Asked Questions (FAQ)
Q: How does the cumulative percentage line work?
A: It calculates the running total of bar values as a percentage of the overall total, helping identify the top contributors.
Q: Can I display more than 100% of values?
A: The chart will always show 100% on the cumulative line, but you can limit or include more categories using “Show First X%”.
Q: Does the chart update in real-time?
A: Yes, based on the Refresh Interval and the data stream it receives.