This document discusses principles of user-centered design and good and bad design. It provides examples of a slide projector with one button and a telephone without a visible hold function to illustrate bad design principles. Key principles of good design discussed include visibility, mappings, appropriate clues, and feedback. User-centered design aims to simplify tasks, provide mental aids like visibility and feedback, and ensure users maintain control. It also discusses designing for errors and standardizing design while considering constraints.
21. User Centered Design(Cont.)
Three Conceptual Design
Design Model
In Designer's Mind
User Model
How User Learn to operate
Systems Image
22. User Centered Design(Cont.)
Simplify The Task's Structure
How?
Provide Mental Aids
Visibilities
Feedbacks
Ability to Keep in Control
23. User Centered Design(Cont.)
Fully automated is good?
Yes?
I don't have to do anything?
No?
Thing can go “wrong”
Out of control
Not Fully Yet?
Ability to “Control”
28. User Centered Design(Cont.)
All are fine?
Ready to go?
●
Standardize!!!!!
How Soon?
Any constraints?
Possibly Yes
Cultural?
Mentality?