Cumulative flow diagram

A common graph used together with Kanban is the cumulative flow diagram. It looks like what is shown in the following diagram:

Cumulative flow diagram

A cumulative flow diagram shows the number of items in each column

The diagram shows the accumulated number of issues in a flow with the four statuses: Todo, In dev, Test, and Done. After one day there are 3 issues on the board, 2 in Todo, and 1 in In dev. On day 9 there is 1 issue Done. That means we have spent 8 days to complete it, which means that is we have a lead-time of 8 days. At the same day there are 13 not done things on the board. The Todo line is on 14 and 1 thing is in Done. This means ...

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