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.

I noticed that my friend's TV remote has a different design for the battery slot. I was surprised that it was different than a traditional TV remote. At first I could not open the slot for the batteries, so I gave up and asked my friend how he usually opens it. Even he struggled to open it because he never had to change the batteries. Finally, he opened it and the batteries came out flying after applying so much force. Inside, the batteries fit in similar to shotgun bullets.

Although, this TV remote design has good mapping of how to open the battery slot it fails our conceptual model of a TV remote. The remote does not provide a coherent system image of how a TV remote battery slot should look like. The TV remote also fails two constraints; semantic and cultural constraints. No one who has ever seen this design can be sure what it does and knowing the amount of force it needs to open.

A solution can be redesigning the TV remote battery slot to look more like a traditional TV remote and easier for consumers to use without applying so much force. That is, so the TV remote will no longer look like if you are putting bullets in and allowing the slot to slide up. This will allow the consumerism to know right away how to open the slot and easily be able to by sliding it with a little amount of force.