MBSE with GENESYS 2024

Key Semantics of Activity Diagrams

• Activities

• Nodes on flow lines (branches) • Drawn as rounded rectangle • Number and name standard • “Rake” indicates decomposition

• Constructs • Sequence

• Decisions (Select and Multiple-exit) • Fork and Join (Parallel) • Loops (Loop, Iterate, and Replicate)

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Key Semantics of Activity Diagrams, cont.

• Items

• Typically name only • Drawn as rectangle • Shows only local relationships • Input relationship represented as single arrowhead with <> decoration • Triggering relationship represented as single arrowhead without decoration

Additional information available in Chapter 9 of A Practical Guide to SysML

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