Hi Anonymous,

some firms indeed adopt an interviewer-led approach, where the interviewer leads you through the case and, whether you have completed or not a section of the analysis (eg math or graph interpretation) moves you to the next step. This kind of interview is typical at McKinsey, but it is used as well in other companies when the interviewer is interested to see how you approach different areas of the case and/or has a specific time limits (eg first round on-campus MBA interviews which have usually a specific time constraint).

Other companies adopt instead an interviewee-led approach, where the interviewer leaves to the candidate to lead the case, and will just provide information when asked.

As a general tip, I would recommend to prepare for an interviewee-led approach, thus keeping an attitude to move forward with the case, and simply be flexible in following the guidance of the interviewer so far that he/she leads you to a specific part when he/she uses an interviewer-led approach.

Hope this helps,

Francesco

"cracking the case" in just 25 minutes without help is very rare - it can happen (I did... once, I think), but not necessary. The main objective of the case interview is for you to show us that you can think logically, methodically, using the 80/20 approach... and will be able to crack today's case and the next and the next "if given enough time".

As a result, it will indeed happen that your interviewer gives you an answer or makes simplying assumptions. Don't count on it, but don't be shocked/scared if that happens. And as Francesco suggested here (and various ex-McK coaches here have also argued in the past), prepare for the interviewee-led case first and foremost, the interviewer-led will be easy to transition to.

Time is an issue in cases, but not the key. Unless you are so slow that you consistently don't finish cases in the time they have alloted for you, this is not an issue and will not be specifically tested.

You should however, keep time in mind and prioritize what you're doing with it. E.g. when you have spent 40 minutes on a case already and you're still going down an irrelevant rabbit hole, I will note that you're not very concious of time.