IPA IP 2022 Question 15

The roles of the people needed for the tasks — the partitions (swimlanes) of an activity diagram show who does each action.

A UML activity diagram models a flow of work:

• •actions (the rounded boxes, Task a to Task c) and the arrows that order them
• •the start node (filled circle) and the final node (filled circle in a ring)
• •decisions and merges (diamonds) with guard conditions such as [YES] and [NO], so branches and loops can be drawn
• •partitions, the lanes X and Y and the task groups A and B, that assign each action to the person, role or organization that performs it

So the diagram tells you that Task a is done by X and Task b by Y: the division of roles. It has no notation for amounts such as money, durations or quality targets.

Answer (d)

Why not others:

• •(a) — costs are not part of the notation; they are estimated separately, for example in a cost breakdown of the process
• •(b) — the diagram shows the order of the tasks, not how long they take; durations belong in a schedule such as a Gantt chart or an arrow diagram
• •(c) — quality indicators of the deliverables are defined in quality plans or acceptance criteria, not in a flow of actions

Key rule: An activity diagram shows the flow of actions, its branches and loops, and through swimlanes who performs each action; it shows no cost, time or quality figures.

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