Uml sheet question 1: The Big Book Store (BBS) is a small chain of bookshops which sell books directly to university library staff. BBS sales staff use a basic computer system to manage their stock but they wish to improve this system. In order to develop an improved system, they need a UML (the Unified Modelling Language) model of the current system. The systems analyst has recorded the following telephone conversation which needs modelling in UML. [Customer] “Hello – my account number is 14502, I would like to purchase the book titled “Software Engineering” by the author “Yasser Fouad”” [Sales Agent] “Hello Mr. Ahmed – I have found your file –can I just confirm your details? Is your address still the Alexandria University, Computer Science Department, Egypt?” [Customer] “Yes – that’s the correct address” [Sales Agent] “Let me have a search for that book. Yes, we
Uml sheet question 1:
The Big Book Store (BBS) is a small chain of bookshops which sell books directly to
university library staff. BBS sales staff use a basic computer system to manage their stock
but they wish to improve this system. In order to develop an improved system, they need
a UML (the Unified Modelling Language) model of the current system. The systems analyst
has recorded the following telephone conversation which needs modelling in UML.
[Customer] “Hello – my account number is 14502, I would like to purchase the book titled
“Software Engineering” by the author “Yasser Fouad””
[Sales Agent] “Hello Mr. Ahmed – I have found your file –can I just confirm your details? Is
your address still the Alexandria University, Computer Science Department, Egypt?”
[Customer] “Yes – that’s the correct address”
[Sales Agent] “Let me have a search for that book. Yes, we have 33 copies of the book in
stock.”
[Customer] “Great – I’ll take two copies – do you have any other books by author in
stock?”
[Sales Agent] “Let me search again... Yes, we also have his book “
you want that too?”
[Customer] “Yes but just one copy... I think you have my credit card number stored on file –
please charge that”.
[Sales Agent] – “I have found your credit-card record. I will now create an order for the three
books – the cost is E.L. 550 – let me just process the payment by checking with the credit card
company.
[Sales Agent]” Thank you – the order is being dispatched to your usual address.”
Draw the following diagrams to describe this interaction including as much detail as you
can derive from the telephone call. If you need to make assumptions, then these should be
noted within the diagram.
(a) A Use Case Diagram for the interaction.
(b) A Class Diagram for the system described in the interaction. Include any methods and
attributes you know.
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