My friend and I went to Vivacity Megamall, just to release stress after hours of sitting in front of the laptop and do coding. We parked our car at the multilevel parking space and luckily we found one with the shortest distance to the nearest the lift. As soon as we arrived in front of the lift, I quickly pushed the button to go down the level. The door opened and we both entered the lift. Unfortunately, none of us remember at which level did we parked the car and to which level should we pressed the button inside the lift. We were both a bit panicked since there were only the two of us inside the lift at the moment. The button and the description for each level was a bit confusing. I tried to press any button and we ended up at the same level. There are only two buttons that I understand, the G and LG label button which is going to the Ground Floor and Lower Ground Floor respectively. Instead of using the trial and error concept, I just pressed the G button and down we go to the Ground Floor. We reached the Ground Floor safely and walked out from the lift. This case study can be related to one of the fundamental design principles which are Mappings.