Hi,

I see the 3 options here:

1. The interviewer takes the leadership from the beginning asks you to think specifically just about the potential structure. (E.g. "Could you please develop a structure on how to assess the potential markets to enter?")
2. It's not clear from the beginning which type of the case it is. In that case, after I present my structure I would ask proactively something like: "Is that structure good to move forward with? Should I add something or maybe prioritize any particular area of the analysis?" Thus the interviewer will tell you what to do next.
3. You just start driving the case and see whether the interviewer will take the initiative

Also please don't forget to ask the clarifying questions in the beginning:

1) Clarify the business model / how the business actually makes money. Even if you think you understand it, try to repeat it to make sure that you understand it correctly. e.g. if the case is about oil&gas company which revenues are declining, ask if it is Up / mid / down-stream problem. In this case, defining a revenue stream is critical to setting up the right structure.

2) Clarify the objective. Here make sure that your goal is:

• Measurable
• Has a time-framed
• Has / has no limitations

e.g. Should I invest 100k in this business for 1 year if I want to get 15% return?

3) Ask the questions that will help you build a relevant structure and remove ambiguity.

Best!