Events: Start, Intermediate, End
Events are represented by circles. The border weight tells you what type they are:
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Tasks: the Units of Work
A Task is a rounded rectangle. It represents a single, atomic unit of work performed by a person, team, or system. 'Atomic' means it does not need to be broken down further at this level of the diagram — the step is simple enough to be understood as one action.
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Sequence Flow: the Connective Tissue
Sequence Flow is the solid arrow that connects elements within a process. It shows the order in which things happen — which task follows which event, which gateway leads to which task.
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Gateways: the Decision Points
A Gateway is a diamond shape. It controls where the flow goes next — either splitting into multiple paths or merging multiple incoming paths back into one. Gateways do not perform work; they route the process based on conditions, events, or the state of parallel branches.
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