3 lessons · Week 2
1
Pools and Lanes
A Pool represents a separate participant in a process — a distinct organisation, an independent system, or a major actor whose internal process may or may not be relevant to the diagram.
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2
Modelling Handoffs
A handoff is when work passes from one Lane to another inside the same Pool. In BPMN, it is visible as a Sequence Flow crossing a Lane boundary. Every Lane-crossing arrow in your diagram represents a moment where responsibility transfers.
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3
When to Use a Collapsed Pool
A collapsed Pool is an external participant represented as a plain rectangle with no internal elements visible. It shows that the participant exists and interacts with your process — but their internal process is either unknown or irrelevant to this diagram.
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