I need to create a Use Case diagram using the following scenario, this is all I have to work with so it should work according to this.
My Actors are - Buyer, Seller and User (I think)
Scenario
The eAuction system allows multiple users to conduct auctions electronically. Once a user has setup an account, they are able to act as a seller and start an auction by listing an item to be sold. They may also act as a buyer by browsing auctions that are in progress and bidding on any item whose auction has not closed. A user does not need to setup an account to simply browse auctions in progress.
An auction is started when a seller inputs data including, a description of the item, the starting price, the reserve price and a date when the auction will close. The system enforces an upper and lower bidding increment of 20% and 10% of the starting price respectively. The system also enforces a closing date ≤ 7 days from the current date. Once the data has been input, the auction automatically becomes pending and the seller must verify the auction before it starts.
When a user wants to make a bid against an item, they must first locate the auction in question by browsing the auctions that are in progress. They may then make a bid that the system must check is within the upper and lower bidding increment amounts. Each auction keeps track of every bid made against the item. Once the auction closes the system checks to see if the item’s reserve price has been met and if so, informs the buyer with the highest bid of their victory. If the item’s reserve price has not been met, the system informs every buyer who made a bid and the auction is closed.
Both sellers and auctions may be temporarily blocked which prevents the sellers from logging on or the auctions from being browsed or bid upon respectively.
