It was the same day when I washed my clothes at the self-service laundry. Some of my clothes were still damp but luckily the self-service laundry also provides drying machines. Since I still have a few of the special coins, I decided to dry my clothes there. Furthermore, if I were to bring back all my damp clothes back to my room, it would be a hassle. I loaded all of my clothes inside the machine and closed the door tightly. Then, I pushed the button with label medium temperature. I took out the special coins and inserted them one by one into the coin slot until the number of coins left to be inserted becomes 0. Lastly, I pushed the Start button and the machine started to do the operation. The steps were just short and simple, making it easier for me to understand. The simple screen also made feel at ease as it displayed the time left for the operation to be completed. This case study can be related to one of the fundamental design principles which are Affordances.