MBSE with CORE 100821

Activity Diagrams

• Reflects the most complete SysML representation of behavior • Control flow • Item flow (including pin) • Allocation • Best suited when dealing with software audiences or working at the design level • Remember “verbs” (SEs) vs “nouns” (SwEs)

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Key Semantics of Activity Diagrams

• Activities

• Nodes on flow lines (branches) • Number and name standard • “Rake” indicates decomposition • Pins optional to reflect detailed interface specification • Constructs • Sequence • Decisions (Select and Multiple-exit) • Fork and Join (Parallel) • Loops (Loop, Iterate, and Replicate)

390

MBSE with CORE