Affordance nr 1 – Elevator Buttons

1. The possibility of action: Comes from acquired knowledge – Pressing the buttons
2. Tags : The button with numbers on it shows the levels that the elevator will move and some support actions such as open/close the door, emergency stop, and alarm.
3. Mapping: Numbers and Icons
4. Feedback: The elevator starts moving 
5. Rating:  bad design – excessive numbers stickers on the side of the buttons. Does not have Braille symbols so blind people cannot use it.