Driving the Case Forward

This lesson teaches how to move a case forward after the opening by choosing the next analytical step, requesting the right information, and keeping the discussion directional.

Why This Matters

Many candidates start reasonably well and then lose momentum.

They build a structure, but once the interviewer gives data, they do not know:

• what to do next
• what information to ask for
• how to connect one insight to the next

Driving the case well is what makes the interview feel like real problem solving rather than a sequence of random reactions.

What Good Looks Like

Driving the case means using your structure, hypotheses, and evidence to guide the next move.

You are not supposed to know the full answer immediately.

But you are supposed to:

• choose a branch
• explain why you are choosing it
• ask for useful information
• update your direction as you learn

In the Interview

After your structure, think in loops:

1. choose the next question
2. request or analyze evidence
3. extract the implication
4. decide the next question

That loop repeats throughout most of the case.

A Reliable Way to Do It

1. Start from your priority branch

Do not abandon your own structure immediately.

Use it to guide the first move.

2. Ask for information with a reason

Instead of:

“Do you have any data?”

say:

“To test whether the decline is driven by traffic or ticket size, I would like to see how volume and average spend changed over time.”

3. Interpret before moving on

Do not treat data review as a passive reading exercise.

Say what the finding means.

4. Decide what the implication changes

If the evidence supports one branch, go deeper.

If it weakens that branch, pivot.

5. Synthesize occasionally

You do not need to wait until the very end to summarize.

Example

Suppose you are solving a profitability case for a retailer.

You start by looking at revenue and learn:

• traffic is stable
• average basket size is down
• product mix has shifted toward lower-margin items

A strong candidate does not just repeat those findings.

They say:

“This suggests the problem is more about revenue quality than customer volume. I would next want to understand whether the mix shift is driven by heavier promotions, changing customer behavior, or stock availability in higher-margin categories.”

That is how the case moves forward.

What Strong Candidates Do

A strong candidate:

• has a clear reason for the next step
• requests targeted data
• interprets findings
• updates direction based on evidence
• keeps the interviewer oriented

What Weaker Candidates Tend to Do

A weaker candidate often:

• asks for broad data without purpose
• reacts to each chart in isolation
• never says what the finding means
• loses the thread of the case

Common Traps

Mistake 1: Random data requests

If you cannot explain why you want a datapoint, you probably should not ask for it.

Mistake 2: Reading without interpreting

A chart matters only if you explain its business implication.

Mistake 3: Sticking to a dead branch

If the evidence weakens your initial view, change course.

Mistake 4: No mini-syntheses

If the interviewer has to infer your logic, you are making the case harder than it needs to be.

Practice Prompt

Imagine you discover that profit is down because gross margin fell, while customer volume stayed stable.

What would you want to investigate next, and why?

Example Response

A strong transition could sound like this:

Since traffic is stable but basket economics deteriorated, the issue appears to be on revenue quality rather than demand quantity. I would next test whether pricing pressure, discounting, or mix shift is driving the lower basket outcome.

What to Remember

• Driving the case means choosing the next useful question and explaining why.
• Ask for targeted data, not generic information.
• Always interpret findings before moving on.
• Good case flow comes from repeated loops of question, evidence, implication, and next step.