アクティビティ図(Activity Diagram) UML入門 IT専科
アクティビティ図（Activity Diagram） アクティビティ図とは、連続する「実行」の遷移、つまり一連の｢手続き｣を表現するための図です。
Activity diagrams: What they are and how to use them IBM
In its basic form, an activity diagram is a simple and intuitive illustration of what happens in a workflow, what activities can be done in parallel, and whether there are alternative paths through the workflow.
Two Circle Venn Diagram Template | Education World
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Functional flow block diagram
A functional flow block diagram (FFBD) is a multi tier, time sequenced, step by step flow diagram of a system’s functional flow. The term "functional" in this context is different from its use in functional programming or in mathematics, where pairing "functional" with "flow" would be ambiguous.