![]() The system checks that all of the required information were entered. The CUSTOMER enters all of the required information. ![]() The CUSTOMER clicks the REGISTER button on the Home Page. Actor/s: CUSTOMER Pre-condition: An unregistered CUSTOMER. Log-in A new CUSTOMER needs to first register into the system before performing any transaction. The CUSTOMER clicks the Log-in button on the Home Page. A CUSTOMER needs to log-in before performing any transaction Actor/s: CUSTOMER Pre-condition: A registered user.Register Order books Sell used books Review books Customer On-line Bookstore System Log-in > Check out > (CustID) Use Case Context Diagram.Post-condition: The CUSTOMER has been authorised to perform transactions. Customer Use Case Description: A CUSTOMER needs to log-in before performing any transaction Pre-condition: A registered user.Auction Website Use Cases Auction Website Search for item Place bid Put item up for auction Register account Customer. ![]() Use Case Diagrams A Detailed Description.
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