Back to overview

Hypothesis ( bcg style )

My question is when should you say your hypothesis? . 
Scenario 1 : there are two main drivers for profit which is revenues and costs. This is my main two buckets and before I dive deep into them my initial hypothesis is xx

Scenario 2: i read out my whole structure then state my hypothesis.

And how wide is the hypothesis in the beginning? What could it be for example for a profitability case?

1
< 100
0
Be the first to answer!
Nobody has responded to this question yet.
Top answer
Profile picture of Franco
Franco
Coach
1 hr ago
Ex BCG Principal & Global Interviewer (10+ Years) | 100+ MBB Offers | 95% Success Rate

I get this question a lot, and I think there’s a common misunderstanding here.

A hypothesis is not a guess. It should be based on some evidence or logic, not something you “throw in” at the start.

So for your two scenarios: I wouldn’t do either. Stating a hypothesis right after reading the prompt or right after your structure is, in most cases, just guessing; and that doesn’t add value. At the beginning of a case, your job is to:

  • clarify the problem
  • build a solid structure

Not to predict the answer without data.

The only exception is if you have very specific prior experience in that exact industry; then you can say something like: “In similar situations I’ve seen X being the main driver, so I’ll keep that in mind as we analyze.”

But even that should be light, not a strong claim.

The right moment to use hypotheses is during the analysis. For example, after looking at a chart or doing a calculation, you can say: “Based on what we’re seeing, I’d hypothesize that the issue is coming from X rather than Y.”

That’s much stronger because it’s grounded in evidence.

For a profitability case, a good hypothesis would be something like: “Given revenues seem stable and costs have increased, I’d focus on cost drivers as the likely root cause.”

Bottom line: don’t force a hypothesis at the start; build it as you learn more.

Hope this helps,
Franco