Chapter 03: Case Study

1
Chapter 03 Case Study

• 3.1. What is and is not Covered in the Case
  Study?
• Traditional business software applications
  include UI elements, core application logic,
  database access and links to external software or
  hardware
• To learn about OOA and D using UML we will focus
  on the core application logic layer
• These core skills can transfer to other layers
  and other application styles
• See Fig 3.1 for simple layer architecture scheme

2
Fig 3.1 Simple Layer Architecture Scheme
3

• Our focus is on OOA and D using the UML.
• 3.3 Case One The NextGen POS System
• A point-of-sale (POS) system
• A computerised application used to record sales
  and handle payment
• It includes hardware (Terminals, card readers
  etc.)
• It interfaces to various external applications
  (inventory control, banking software etc.)
• May support multiple and varied client-side
  interfaces (thin terminals, web browser, desktops
  etc.)
• May be generic so that it can be sold to many
  clients (shop-chains) in various countries (which
  adds complexity)

4

• 3.4 Conclusion
• Remember our focus is on learning to apply the
  UML for OOA and D within an iterative,
  evolutionary and agile process
• It is not about coding, graphics or UIs
• Questions Please