I was feeling hungry and exhausted while walking along the waterfront that evening. There were a few stalls along the way but I was craving for McDonald’s burger. Walking back to Plaza Merdeka would be more tiring. So, I decided to continue my walk towards the McDonald’s self-service kiosk, near to the Kuching’s Cat Statue. I entered the restaurant and saw three kiosks available to be used. I choose the leftmost kiosk and touch the screen as instructed by the main screen, Touch to Start. Then, I touch the button for Take-Away. There was an option to choose the language which is English or Malay, but once I choose the Take-Away button, the screen immediately changed to the payment method, not giving me a chance to change the language. It was not a big deal since there must be another reason why the screen changed as soon as I choose either Take Away or Eat In. I was stuck for a while, to choose either to pay using my credit card or pay at the counter. Maybe being a first-time user, I am used to be a little bit extra careful to pay using a credit card. So, I choose to pay at the counter and the menu screen appeared. I went through the menu and choose to order my desired burger, Big Mac. There was no option to add the amount of burger directly after I choose one. I need to add one burger and back to the menu, then I can add another burger. Once I had chosen my desired food, I pressed Done and it goes to the confirmation screen. The kiosk then printed out the invoice for me to pay at the counter. This case study can be related to one of the fundamental design principles which are the Conceptual Model.