The scenario
An online platform connecting customers with experts for consultation sessions, including payment and rating features.
What is in this drawing
Read the decisions behind it.
01
Chose to model 'Make Payment' as included in 'Request Consultation' and 'Rate Expert' as extending it upon session completion.
02
Introduced 'Validate Payment' as an included sub-use case to connect to the external payment gateway.
03Kept actors distinct
Customer initiates most use cases, Expert reviews requests, and Payment Gateway external.
When modeling a service marketplace with user roles, external payment systems, and conditional extension (e.g., rating after session).
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