Use Case Diagram Question:
1. A customer uses a drink in the following way: he puts a coin in the drink collector
parts, he selects the drink, he collects the chosen drink from the drinks tray and
excess change in the change trap. Who is the actor in the system? Is it the drink,
the coin collector, the customer, the drinks bin or the coin trap?
2. Marcel, whose job is to supply vending machines, can help himself to drinks. For
model this activity of Marcel, should we define a new actor? How do you model that?
3. When Marcel comes with his clarque filled with new drinks to fill the
drinks distributor, is it considered a new player? How do you model this?
4. Some suppliers are also qualified to carry out maintenance operations
in addition to the usual operations of suppliers. They are therefore restorative in addition
to be a supplier. How to model this?
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My answer is:
Client is the system actor
marcel is a sub type of Client with additional functionality (supplyu vending machine)
Maintenance suppliers are a sub type of marcel with additional functionality (repair vending machine)
and my use case diagram looks like:
Client has a UC buy drink, which extends get money back and includs put money in and also includes choose drink
marcel has an extra UC which is supply the vending machine
and maintenance supplier has an extra UC which is repair the vending machine
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