EY-Parthenon's structure and evaluation style lean closer to the MBB model than the other Big 4 strategy practices, so prepare accordingly.
For Round 1, they are primarily testing your ability to handle complexity under pressure and maintain structure. You should absolutely focus on core profitability diagnostics and market sizing/entry, but make sure to practice basic M&A Screening cases too. The key difference compared to MBB is often the ambiguity level—EYP cases might have slightly cleaner, more data-driven prompts, but the expectation for MECE structuring and precise quantitative analysis remains extremely high.
In terms of personal skills, the German offices highly value analytical rigor and structured communication. When you present your behavioral stories, do not focus on flowery descriptions of leadership; instead, focus on the process of structured collaboration and how you precisely broke down a complex team problem. They want to see someone who can articulate their logic clearly and concisely, especially when discussing conflicts or setbacks. Show that you prioritize systematic thinking over gut intuition.
Ensure your frameworks are adaptable, not memorized rigid lists. Good luck!