The scenario
This diagram models the primary use cases of a mobile shopping application, including customer interactions, payment processing, and inventory management.
What is in this drawing
Read the decisions behind it.
01
Used 'include' for Checkout→Pay and Pay→ValidateCard to show mandatory sub-steps
02
Modeled Payment Gateway and Inventory System as external actors
03
Kept the diagram simple by omitting extend relationships (e.g., no optional features such as discount codes)
When designing or documenting a mobile shopping app's functional requirements, showing how actors interact with payment and inventory systems.
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