DOSCST SCIENCE LABORATORY SYSTEM

USE CASE: RESTAURANT SYSTEM

Use Case UC1: Pay bills
Actor: Costumer
Cashier
Description: The costumer wants to pay his bills after he eat
Pre-Conditions: the costumer succesfully pay his bills
post-Conditions: the cashier get the money and accepted by the system
Main flow(s):
1. after the costumer eats, he pay his bills
2. the cashier accept/get the costumers money.
3.the cashier give the change and give it back to the costumer
Alternative Flow(s):
(A1) The costumer did not pay the bills
post-condition: the system alerts the manager
Extension Flow(s):
(E1) the costumer forgot his money