A cumulative flow diagram focuses on which curves?

A cumulative flow diagram is a visual representation that illustrates the flow of work items through different stages of a process over time. The key aspects of this diagram are the arrival curve and the departure curve.

The arrival curve represents the work items that are entering the system, or the backlog of tasks that are yet to be started. This provides insight into how much work is coming into the pipeline. The departure curve, on the other hand, illustrates the work items that have been completed or "done," which indicates how efficiently tasks are being completed.

By focusing on these two curves, a cumulative flow diagram allows teams to monitor workflow stability, identify bottlenecks, and understand the overall capacity of the system. Effectively, it shows how much work is pending versus how much has been accomplished over a period, giving valuable insights into the team’s performance and agility.

The other choices involve terms that do not align with the core elements of cumulative flow diagrams, focusing on concepts that may relate to movement, implementation, or throughput but do not capture the fundamental purpose of tracking what has entered and what has left the work process.