Sitting in the passenger seat of a friend's car, I noticed his car clock was an hour early. I tempted to fix the time for him while he was driving, but the buttons were too small to press. Then, he told me that the buttons can only be pressed with a small pointed tool like a pen or a pencil. I looked around me and there weren't any sharp tools to use in his car. Before knowing that I needed a sharp tool, I was using my little finger and trying to make it fit. I figured that there is a strong possibility that this design was not usable.

The design as you can see already fails the conceptual model of clock buttons in a car or any clock for that matter. The buttons are not a coherent system and inconsistent. The design also fails affordances because there is no proper affordances that exist to make the desired action of pressing something. With no proper affordances, a signifier occurs due to the uncertainty and feedback that wasn't properly communicated after trying to press the button.

Able to fix this problem, a simple solution could be changing the button's size and their texture to be more plastic or rubbery, in which, I think rubbery button might have more of a gentle click than a plastic one. But, I think its important that a different size and texture of the button can make a difference to people being able to actually change their clocks in a car instead of having to keep planting on it.