If the feedback says that you are not driving the case, it means a number of things:
- You are not constantly structuring throughout the case
- You are not asking the questions
- You are not keeping the tempo of the case (E.g. staying in silence instead of structuring the problem further)
My best advice - never stop using the structures. Make an initial structure, present the structure (literally, rotate your paper and show your structure) and then dig deeper using the new structures. If you get stuck - make a structure. If you need to isolate the problem - make a structure. And go through the structure as fast as possible, trying to narrow down to the root cause of the problem.
Let's say one of the operations (moving across the warehouse) requires 2 more FTE than your competitor:
Structure 1: Frequency of moving * Number of people * time per move
- Let's say you find out that only the time per move is different. You follow up with the next structure:
Structure 2: Speed of moving * distance
- Let's say you find out that the distance is bigger
Structure 3: size of the warehouse / layout of the warehouse
- You find out that the size of the warehouse is the same but the layout is different - Bum! You found the root cause!
The whole thought process should take just a couple of minutes and should be very dynamic - you are constantly driving with the new structures and asking the right questions