I was interviewed by two Managers back to back. It took a total of 3 hours. The first person spent 5 minutes asking me about my background and CV and why I want to do consulting and we spent the rest of the hour doing a market sizing question and a standard profit & loss case study. The second person interviewed me for another hour for another case study with time for questions at the end. The two didn't give any direction during the case studies so I thought my responses were OK and they didn't want me to go deeper. The case studies were incredibly easy, so it had quite straightforward solutions. It was difficult to come up with creative ones for such easy scenarios with obvious solutions. They ended up not letting me go to the next round because I was "too general." - even though I did a great job keeping the flow of conversation throughout and asking all the right questions.