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Cumulative Flow Diagram (CFD)
This is an area chart that shows the various statuses of work items for an application, version, or iteration. The horizontal x-axis in a CFD indicates time, and the vertical y-axis indicates cards (issues). Each colored area of the chart equates to a workflow status (a column on your board). Status groupings are used for standardization. (See Status Grouping Matrix for more detail)
The CFD can be useful for identifying bottlenecks. If your chart contains an area that is widening vertically over time, the column that equates to the widening area will generally be a bottleneck.
CFD shows the tasks at each stage of the project over time. In the example on the left, the purple area represents the tasks that are completed, the yellow area represents items in development, and the light blue area covers the backlog refinement.
CFD may seem complicated at first but upon closer look, it can provide a number of useful insights. For example, the vertical axis of the chart shows the number of tasks currently being worked or completed.
The horizontal line represents cycle time.
Click here to read more about CFD
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