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The Opening:

Not necessary to ask clarifying questions at the start if you don’t have any. DON’T simply repeat the case Q and ask if you are right unless it really requires a clarification that has some bearing on the case.

If you are not aware about the concerned industry, ask. Say that you are unfamiliar and would like to understand the business model.

Once you are set to start, ask for a while to think. And relax, organize your thoughts. Don’t start blurting the first ideas that come to your mind. Organise, prioritise.

Structure:

Prepare your framework.

So if you are thinking of 2 or more options to discuss, first list all the choices you have in mind and then start off in detail about each.

Use language/terms that are specific to the question in hand. Be specific and don’t just use terms from different caes you have studied.

Analysis:

Follow the framework.

Talk through the questions/choices and possible answers/scenarios.

Use numbers if applicable. If required, ask for historical data.

Quality:

Business Sense

Judgement

Creativity

Summary :

30-40 seconds. Stick to most relevant point and provide final summary.

MARKET SIZING

1. Top down approach. Start with a big number, apply reasonable filters to arrive at a required estimate.

2. Use multiple steps to filter. DO not jump into a final estimate.

3. Its ok to check with your interviewer if your assumption is reasonable. Look out for their reactions when you are stating your assumptions.

4. But don’t start asking for every single step.

5. Round your numbers for easy calculation.

6. Sense checking – when you arrive at a final number, try another quick calculation to look at the numbers from another angle.