Very efficient interview. Three interviews during four hours 1:1 with consultants. I think the interview format is adapted to the person's background and experiences. The first interview was a normal personality interview, which was a lot of fun and the consultants were very friendly. The second interview was a business case to make sure I had some basic knowledge of business optimization (have a purely technical background) but still very friendly atmosphere. The third interview was one guesstimate and one "company structure case" about IT. I have no knowledge whatsoever about IT and did not solve the case, but again the consultant was friendly, helpful and understanding. I would advice you to try to have fun during your interview and to relax. You don't have to know everything, if you have difficulties with one case, let them know and take it as an opportunity to show them how well you deal with stress and challenges!