CSCE 470 Lecture 30

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Google Poetics

HCI Design Process and Principles

• We design for the user
  • Not designers
  • Not for system
  • User-centered

• Make use of cognitive principles where available; important guidelines:
  • Reduce memory load
  • Speak user's language
  • Provide helpful feedback
  • Respect perceptual principles

User-Centered Design

Assesment:

• Find out:
  • who users are
  • what their goals are
  • what tasks they need to perform
• Analyze Tasks:
  • characterize the steps needed
  • create scenarios

Iterative Design Process

1. Design: sketch an idea
2. Prototype: proof-of-concept
   • Fidelity: low = paper; medium = http://gomockingbird.com; high = working concept
3. Evaluate: see if it works

Rapid Prototyping

• Build a mock-up of design
• Low fidelity is better

Why Prototype?

• Get feedback on design faster
• Experiment with alternative designs
• Fix problems before code is written