Use Case Description Assessment Answers

Task 1 Use Case Description
Use case is a user system interaction defined to extract the requirements from problem domain. Use cases are used to develop the use case diagram. The use case diagram of Caf de Carol is presented below.

Use Case Diagram - Caf de Carol
Use Case Description
The use description is taken for use case meal order process. The general brief description of use case meal order process is presented below.
Meal order process used to detail the user system interaction for the ordering of meal (Food) from the Caf de Carol by customer. The order is processed by Caf de Carol once the order is placed by the user with specific time slot from 11 AM to 10 PM Every day.
Detailed Description of use case meal order process is given under the table with all the facts associated with the meal order processing.
Meal Order Process
Brief Description The actor initiate the process to order meal
Actors Customer, System, Payment Gateway, Database
Preconditions Customer logs to system, customer first register with the system
Basic flow of events
Customer logs to the system of Caf de Carol
System of Caf de Carol authenticates the customer
If not authenticated then asks for registration and goes to first step
Customer select the food items such as meal
Customer selects the option for delivery like dine-in, takeaway, home delivery
Customer selects the time slot
System verifies the time slot availability
If time slot is not available then system provides the advance time slot
Customer select the given time slot or cancel all processes
Customer pays 5 for booking confirmation by Payment Gateway.
System stores the booking information in database.
System confirms the booking and message to customer
Extensions
System fails to authenticate customer
System suggest the customer to register first
System prevents the customer if customer is register and fails for authentication
Post conditions
Customer view of print the order receipt
Customer logout the system
Special requirements Customer must have Internet Connection and connected to Internet
Task 2. Sequence Diagram
The sequence diagram from the selected use case meal order process is designed and modeled with following diagram.

Sequence Diagram Use case meal order Process

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