Exercice 1: In a store, the sales process is as follows: the customer enters, goes on the shelves, possibly requests information or proceeds to tests, takes articles (if the stock is sufficient), goes to the cashier where he pays for his purchases (with any means of payment accepted). He may possibly benefit from a reduction.

Identify actors:

Model this situation with a use case diagram

Exercise 2: A travel agency organizes trips and manages transport, accommodation and offers possibility for its customers to have a taxi at the end of the trip to get to the hotel.

Some customers ask for itemized invoices. Travel can be done either by train or by plane.

Model this situation with a use case diagram

Exercise 3: To facilitate its management, a storage warehouse plans to become computerized. The software to be produced must automatically allocate a location for the loading of the trucks which transport the stock to be stored.

The operation of the computer system must be as follows:

-) unloading from a truck: when a truck arrives, an employee must enter the characteristics of each item into the system; the system then produces a list with a location for each item.

-) loading a truck: the characteristics of the items to be loaded on a truck are entered by an employee in order to tell the system to free up slots.

Loading and unloading is done manually.

Identify actors

Model this situation with a use case diagram

Exercise 4

The customer can use manual pumps and pay at the cashier of the manager or use automatic pumps.

The station manager uses the computer system for his management operations (particularly the balance sheet of gasoline sales operations).

The manager can use the gasoline for his car.

The gas station has a small vehicle maintenance workshop. The manager is also a mechanic.

Identify actors

Model this situation with a use case diagram