Single day. They flew us out. They split us up into 2 groups. There was a 5-minute process improvement presentation, 2 interviews: one with the program lead and the other with two engineers, and one proprietary segment. Simple preparation for typical behavioral questions should suffice.

The process involved a 5-minute presentation on a process I've improved personally. Followed by two sets of behavioral questions from different panels, and lastly a team case study to analyze our ability to work in teams. The process lasted four hours.