Chapter 5: Design Frameworks

Affordance definition

Physical attributes of an object that visually signal how to operate it

Natural Mapping definition

Control layouts mimicking the physical layout of the system state

Don Norman's 4 fundamental interface principles

1. Good conceptual model; 2. Make things visible; 3. Use natural mappings; 4. Provide feedback

Vee Process lifecycle application

Large, high-risk systems requiring detailed sub-system verification before integration

5 metrics tested in Usability Testing

Learnability, Efficiency, Memorability, Errors, and Satisfaction

Field Studies

Proximal & Distal measures

Proximal measure

Immediate (usability, errors) used to evaluate user interactions during the task.

Distal measure

Long-term metrics (manufacturing costs, injury claims)