Hi,
The length is related to your story and additional questions your interviewer may ask.
I recommend using the STAR framework:
It is important that the Interviewers will drill down into your story to understand the dynamics, your reactions and decisions and most of all the rationale behind them. They will follow up with other questions as you tell your story to make sure they understand it in enough detail. I recommend preparing for these additional questions in advance.
Best,
Vlad
Hi A,
McKinsey PEI generally lasts about 15 minutes but is also might depend on interviewer's additional questions. I would also recommend you to use a structure for your answer to make it full and consistent.
Best, Andre
Hi there!
Overall, the McKinsey PEI (Personal Experience Interview) lasts usually between 12-15 minutes (per interview session). A much more detailed breakdown of the PEI you can find on my McKinsey PEI blog directly at https://pei.consulting-case-interviews.com/blog/mckinsey-pei-length/.
Hope that helps!
Robert