What is a cumulative flow diagram in Kanban?

Cumulative Flow Diagram (CFD) in Kanban is a visual tool that shows the number of tasks at different stages of the workflow over time. The X-axis represents time, and the Y-axis represents the accumulated number of tasks. Each colored area on the chart corresponds to a specific status (e.g., "In Progress", "Ready for Testing", "Completed").

CFD helps to:

• Track process stability and throughput.
• Identify bottlenecks when a certain status area expands (task accumulation).
• Analyze task completion speed and forecast deadlines.

Example: if the "In Progress" area constantly grows, it means tasks are delayed at this stage, and the process needs optimization.