The scenario
An event planner uses the PlanIt Go system to create events, manage budgets, integrate external vendors, and process payments.
What is in this drawing
Read the decisions behind it.
01
Modeled Vendor and PaymentGateway as external system actors (rectangles).
02
Vendor integration is broken into main use case with include (Connect API) and extend (Test Integration).
03
Budget management always includes payment processing, so modeled as «include».
Applicable for any event management or vendor marketplace system requiring clear role interactions and system boundaries.
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