Don't overuse black box pools
Communications with external partipants may be modeled with a task alone.
✔ How to
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✘ How NOT to
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Notes
Black box pools and message flows may overload the diagram.
Exceptions
Black box pool and attached message flows shows complete customer's journey within the process.
It's value is disputable because the customer journey usuall assumes wider context than a single process.
See also
Author(s)