Use Case

Use Case: “Search for the books”
Short Description: “The Students are able to borrow a book in the library”
Actor: “Students”
Requirements: “Each Student should have an ID”
Pre Condition: “Each ID of Student should already validated”
Post Condition: “The Students are able to borrow a book”
Main Flow: “Each Student put their name, signature, code of the book and the date to a specified record book”
Alternate Flow: “Your ID was not validate”
Exceptions Flow: “No network connection”


Use Case: “Search for foods”
Short Description: “The customer is able order foods in the restaurant”
Actor: “Costumer”
Requirements: “Costumer should have money”
Pre Condition: “The Costumer picking some foods”
Post Condition: “The Costumer was ordered”
Main Flow: “The Costumer should pay first in the casher”
Alternate Flow: “Your money is not enough to buy this kind of food or not enough to buy your order Sir/Mam”
Exceptions Flow: “Your money is fake!”