Design models

• System-centered design
  • design based on what is convenient for the designer
    • what is easy to design on this platform? what is easy to create with the available tools? what do i find interesting and fulfilling to design?
• User-centered design
  • design based on the characteristics of the intended user
    • what can the user do? what does he need? in what context does he use the system?
  • divided in two different models
    • Task-centered design (system features)
    • Goal-centered design (real goals of the user)

System-centered design

User-centered design

Two process models:

• task oriented model → Usability design (ISO 9421-210 (2010))
  • official international standard (from UK)
  • aim = usability design
  • 5 phases: Feasibility study, User requirements, Implementation, Evaluation, Deploy
• goal oriented model → User experience design (JJG(2011))
  • well known professional (from USA)
  • aim = user experience design
  • 5 planes: Strategy, Purpose, Structure, Skeleton, Surface