Green Street management wishes to increase security, both in their building and on site, without antagonising their employees. They would also like to prevent people who are not part of the company from using the Green Street car park.
It has been decided to issue cards to all employees, which they are expected to wear while on the Green Street site. The cards record the name, department and number of the member of staff, and permit access to the Green Street car park.
A barrier and a card reader are placed at the entrance to the car park. The driver of an approaching car inserts his or her numbered card in the card reader, which then checks that the card number is known to the Green Street system. If the card is recognised, the reader sends a signal to raise the barrier and the car is able to enter the car park.
At the exit there is also a barrier, which is raised when a car wishes to leave the car park.
When there are no spaces in the car park, a sign at the entrance displays Full and is only switched off when a car leaves.
Special visitor’s cards, which record a number and the current date, also permit access to the car park. Visitor’s cards may be sent out in advance, or collected from reception. All visitor’s cards must be returned when the visitor leaves Green Street.
1. Nouns
- Employee
- Cards
- Card record
- Name
- Department
- Number
- Barrier
- Card reader
- Car park
- Driver
- Car
- Check
- Signal
- Raise
- Exit
- Spaces
- Visitor
- Visitor's card
- Reception
2.Use case Diagram:-
- Use case 1:-
- Use Case 2
- Use Case 3
