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Systems Design (input and output (how to collect data (Original ->…

- - - - Usability
        
        disabilities (keyboard alternatives?) / User experience in IT / jargon free language
  - - - Minimise delay and cost maximise accuracy sand usability
- - - - Specify each in more detail
        
        STEPWISE Refinement
        
        Top down
        
        Overview formulated first
        
        Specifies but does not detail sub-processes/sub-systems
        
        Bottom up
        
        Base elements specified first in great detail
        
        Linked together to form larger sub-systems -> linked -> larger -> many levels -> top-level system
- - - - ' - ' private
        ' + ' public
        
        -orderNO
        +GetDetails()
    - - Polymorphism -> many forms. Override functionality defined at super-class within specific sub-classes
      - Super = Shape
        Sub = Circle, square, triangle
- - - - User-Friendly / Reliable / Secure / Available / Accessible / Capacity / Throughput / Responsiveness / Configurable