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.

1. Human Computer Interaction
Chapter-1
The Psychopathology of
Everyday
Things

2. Good Design
“Well designed objects are easy to understand.
They contain visible clues to their operation.”

3. Bad Design
“Poorly designed objects are not that easy to understand.
They doesn't contain visible clues to their operation.”

4. Bad Design(Cont.)

5. Important Principles of Design
“Visibility”
“Mappings”
“Appropriate Clues”
“Feedbacks”

6. Case Study-1
“Slide Projector With Single Button”

7. Case Study-2
“A telephone that hasn't a hold function visible”

8. Principles of Design
Why?

9. Principles of Design(Cont.)
Understandability
Use+Ability

10. Principles of Design(Cont.)
Conceptual Model

11. Principles of Design(Cont.)
Conceptual Model

12. Principles of Design(Cont.)
Conceptual Model

13. Principles of Design(Cont.)
Visibility

14. Principles of Design(Cont.)
Visibility

15. Principles of Design(Cont.)
Mappings

16. Principles of Design(Cont.)
Mappings

17. Principles of Design(Cont.)
Affordance

18. Principles of Design(Cont.)
Feedback

19. Chapter-7
User Centered Design

20. User Centered Design(Cont.)
Knowledge in the World
 Knowledge in Head

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”

24. User Centered Design(Cont.)
 Complex Task?
 How to learn that easily?

?

25. User Centered Design(Cont.)
x Task?
learn that easily?
down the task
e the nature of the partial task to shift to next t

26. User Centered Design(Cont.)
 Dream for error!!!!
 Design to solve your
 Dream Errors

27. User Centered Design(Cont.)
 All are in control?

28. User Centered Design(Cont.)
 All are fine?
 Ready to go?
●
Standardize!!!!!
 How Soon?
 Any constraints?

Possibly Yes

Cultural?

Mentality?

29. Thank You