Question 1
Question 1a
Read the food ordering system requirements in the Appendix and submit answers to the following:
Question 1a(i)
Identify the Actors in the system.
(4 marks)

Question 1a(ii)
Formulate a use case diagram to depict the food ordering system design.
Your use case diagram should show the actors, the use cases and their relationships.
(14 marks)

Question 1b
The following is an extract of the requirements of the food ordering system:
“The food ordering system is a convenient way for students and staff to order food. The system allows food to be ordered from different stalls without having to queue. For example, a student wishing to order Chicken Rice as well as Coca Cola, he can put both items into an order. Orders may be placed for immediate collection or for a later date and time, as long as a date and time is provided.” Analyse the above requirements to identify and explain any TWO (2) ambiguous, incorrect, incomplete or inconsistent inadequacies of the system design. Note that in your answers, you are not supposed to use imagination to add anything not mentioned in the requirements. Further, do not include general commentaries in your answer.
(4 marks)

Question 2
Develop a structural model for the food ordering system design, by submitting your answers to the following:

Question 2a
Complete the class description by identifying classes, their attributes and any hierarchical relationship(s) that would be required for the application.
(15 marks)

Question 2b
Appraise the associations among the classes and hierarchical relationship(s) that would be required for the application. Construct the class association diagram in UML as your answer. Ensure that you do not include any derived or redundant association in your diagram.

 

Question 3
Further analyses, as well as a few walkthroughs give rise to an updated class diagram which allows additional food items to be added to an order as long as the order has not been prepared, part of which is shown in Figure Q3 below.

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