part A

Hau-Ling (Andrea) Chan

I choose the alarm clock as my dislike object.




Visibilty:
- big number
- easy to see the time in dark
- labelled buttons
~the red dots on the right screen sometimes do not appears

Feeback:
- effectively - show the changing
- has te 'click' sound
~the red dot of the alarm clock may not appear

Affordances:
- easy to see all te functions

Mapping:
- have the labelled buttons on the top of the clock
~ the buttons (when you change the alarm time) do not work sometimes
~ change the time by accident when you want to change to alarm time
~ have to wait for a min to show the alarm is on

Physical Constraints:
~ need to have the figure power for pressing the buttons.
~ the buttons are hard to press down

Habituation:

- all buttons are labelled, so the users can easily figure out