A cumulative flow diagram focuses on which curves?

Question

Options

• AArrival curve ("to do") and evolution curve ("change")
• BImplementation curve ("movement") and departure curve ("done")
• CBacklog curve ("work") and departure curve ("done")
• DArrival curve ("to-do") and departure curve ("done")

• A
  3% (1)
• B
  5% (2)
• D
  92% (34)

Explanation

Option D is correct because a Cumulative Flow Diagram (CFD) is specifically designed to track work items entering a system (the arrival curve, representing "to-do" items) against work items leaving it (the departure curve, representing "done" items) - the gap between these two curves visually represents work in progress and cycle time.

Options A and C are wrong because they introduce invented or non-standard terms: "evolution curve" (A) and "backlog curve" (C) are not recognized components of a CFD. Option B is wrong because "implementation curve" and "movement" are fabricated labels - a CFD does not use these terms.

Memory tip: Think of a CFD as tracking items arriving at your door and departing out the other side - "in" and "out," or "to-do" and "done." The two curves that bound the flow are always the Arrival and Departure curves - just remember A to D, like going from start to finish.

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