from what I know (second hand – don't have direct interview experience with them) the first round with HR has the typical fit questions (Why consulting? Why Porsche Consulting? Why should I hire you? Etc.) Best way to do so is to prepare with time constraint for your answer. I just replied to another post with the following suggestion for the fit part:
- Write down all your answers if not done already. Use bullets to structure them.
- Repeat loud the answer. Put a timer with 2 minutes. If feasible, do so with a partner or record yourself
- Reiterate till when you are able to deliver the answer with such time constraint. You will notice that your answers will automatically be more to the point.
Second round they leave you some time on your own (10-15 mins) to work on a business case/market sizing (eg what’s the total sales of a McDonald’s shop in city XYZ); you then have to present your analysis, usually on a white board. You can structure the case as usual, ideally spending some time to write the storyline on the whiteboard if present, to facilitate the following presentation.
Hope this helps,