Build events are events which students need to design and build a device according to the event's rules. During the competition, students will run the device in front of the event supervisor, and each event scores differently according to the rules. Most of the build events are required to impound the device at the very begining of the day of competition, which means teams need to give their device to the event supervisior, and they will store the device for team until it's their turn to run the device.Â