The process took 1 day. I interviewed at McKinsey & Company (Jersey City, NJ) in Aug 2009
Interview
The skills test was one hour long with 26 questions pertaining to three different cases. There were about 30 of us taking it at the same time, with three different test versions. I would say that the practice tests are fairly representative of what I saw on the real test. A fairly even mix of quantitative and qualitative reasoning questions. My strategy for the test was to only read the questions, and then mine for relevant info in the background after I knew what I was looking for. This seemed to work pretty well. I finished my first pass of the test in 30 minutes, leaving several blank (if the question looked too hard I automatically skipped it), and then returned to the difficult ones with the remaining 30 minutes. We don't get a score on the test, so there's no way to really know how well this strategy worked, but it seemed well-suited to me.
3 step process. first was a screening then followed with around 7 case studies. the case studies ranged in varying industries and scope. this was done over a course of 2 months
Too long, too many rounds, too many people interviewing you and you need to follow up several times in order to get a response. They give you the materials to prepare which is good, but everything else is suboptimal
Das erste Interview war mit der HR. Klassische Fragen - Führ mich durch deinen Lebenslauf, warum Consulting, was motiviert dich etc. Das zweite Interview ging 3 Stunden. Nach einem kurzen Kennenlerenen, kamen zwei Case-Studys dran - eins auf Deutsch und eins auf Englisch.