Chapter 23 - Software Development

Chapter 23 - Software Development

1. Waterfall Model

   • "Once development starts, it is carried through to the end"
     • Alternatives
       • Prototyping
       • Rapid Application Development (RAD)
     • Advantages
       • Greater communication with the end-user
       • Fact finding to establish the requirements
     • Disadvantages
       • Mis-interputations may only be realised at the end
   • 7 Stages
     • Analysis
       • Design
         • Software Development
           • Testing
             • Installation
               • Review
                 • Maintenance
                 • Accepted System
               • Installed
             • Test Results
           • Working System User Guides
         • Design doc and Test Plans
     • At the end of each stage item called a DELIVERABLE must be SIGNED OFF

2. Prototype Model

   • Working model that serves for future development
     • Evolutionary Prototyping
       • May evolve into the final system
     • Throwaway Prototyping
       • Like waterfall used to develop a working system