USE CASE DIAGRAMS
Online Auction System Use Case Diagram
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CASE ANALYSIS
Scenario
An online auction platform where bidders place manual or automatic bids, sellers list items, and a payment gateway processes winning bids. The diagram shows key use cases and their relationships.
Key decisions
- Modeled automatic bid as an include of Place Bid
- Outbid notification extends Place Bid via extension point
- Payment Gateway as external actor
When to reuse this
Reusable for any auction or marketplace system with proxy bidding and payment integration.
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usecase-bidding-process-with-automatic-bid-increments