In 30 seconds
- Each band is a workflow state, stacked over time.
- Band width shows work in progress; widening means a bottleneck.
- Horizontal distance approximates lead time.
How to read it
- Each coloured band is a column on the board
- The vertical thickness of a band = items in that state
- The horizontal distance across bands ≈ lead time
- The top line's slope = arrival rate; the done band's slope = throughput
Common patterns
| Pattern | Means |
|---|---|
| A band widening | Bottleneck in that state |
| Flat done band | Nothing finishing |
| Parallel, steady bands | Stable flow |
Using it
Review it weekly in Kanban meetings. When a band widens, look at the step after it and consider WIP limits.
Myth vs reality
Myth · CFDs are only for Kanban.
Reality · Any team tracking states can use them.
Myth · They're too complex to read.
Reality · A few minutes of explanation is enough.
Myth · A CFD shows individual items.
Reality · It shows totals, not specific items.
FAQ
Where do we get one?
Most agile tools generate it automatically.
How long a time range?
Several weeks to a few months.
What if bands cross?
They can't; a crossing means data issues.