1.2.3

• waterfall life cycle?

  each stage is completed before the next one begins
• advantages of waterfall life cycle?

  easy to see if project is on schedule

  everyone has clear responsibilities

  easy to manage

  suitable for large scale projects
• disadvantages of waterfall model?

  lack of user involvement

  not suitable for complex projects

  can't review project until the end

  costly to make changes one project started
• Rapid application development?

  uses partially working prototypes which are continually worked on

  requirements are set by user at the start and initial prototype is made

  user gives feedback and changes are implemented creating next prototype
• advantages of RAD?

  Useful when there are unclear requirements

  good for smaller projects

  continuous feedback from user
• disadvantages of RAD?

  Not suited when code efficiency is important

  doesn't scale well for large projects

  client always has to be involved
• what is the spiral model?

  stages are repeated

  requirements are defined and prototypes are made
• what are the advantages of the spiral model?

  suitable for large projects

  good for projects that contain risk
• what are the disadvantages of the spiral model?

  risk management experts cost money

  if risk analysis is done poorly whole project is bad
• what is extreme programming?

  agile model where development team is made up of programmers and user

  system requirements specified by end user when designing program

  code is written by one person and critiqued by another then improved
• what are the advantages of extreme programming?

  produces high quality code

  constant user involvement
• what are the disadvantages of extreme programming?

  client must commit full time development

  need to work in same geographical location
• what is alpha testing?

  carried out by software development teams within the company checking for bugs
• what is beta testing?

  carried out by end user and feedback is used to inform the next stage
• what is white box testing?

  carried out by software development team

  all possible routes and pathways are tested
• what is black box testing?

  software tested by end user without knowing internal components and how program runs
• stages of SDLC

  1. analysis
  2. design
  3. development
  4. testing
  5. implementation
  6. evaluation
  7. maintenance