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Road to Offer

Case Interview Chart Drill

A consumer hardware business wants 20% more revenue in two years.

Revenue by product line, $M. Product line Core, Revenue ($M) 120; Product line Premium, Revenue ($M) 45; Product line Accessories, Revenue ($M) 30; Product line Services, Revenue ($M) 25.

What share of total revenue comes from outside the Core line?

Fast answer

Case interview chart drill: what to know

  • This free chart drill teaches one exhibit through two guided decisions before your own AI-graded rep.
  • Strong answers say observation, insight, then so-what for the client.
  • The goal is not to describe every number; it is to find the business implication.

The quick version: A chart drill trains you to read a case exhibit, separate observation from insight, and explain the business implication without drowning in the data.

Why case interview chart drills matter

Exhibits are where many cases change direction. A candidate who reads every label but misses the business implication sounds like an analyst, not a consultant. Chart drills build the habit of finding the point of the exhibit quickly.

How the case interview chart drill works

Read the exhibit and make two guided decisions about the key pattern and business implication. Continue free to write your own interpretation in the real drill room, where AI feedback checks whether you found the main insight and avoided over-describing the chart.

View example answers

Chart drill examples

Use this pattern: observation, insight, so-what.

  • Example 1

    A revenue chart shows volume up but margin down.

    Approach

    Observation: volume grew. Insight: growth may be coming from lower-margin segments. So-what: check mix and variable cost before recommending expansion.

    Answer

    The business is growing, but the quality of growth may be deteriorating.

  • Example 2

    A table shows one region has higher churn than all others.

    Approach

    Find whether the difference is large enough to explain the company-level problem, then look for region-specific causes.

    Answer

    Prioritize the region if its churn gap is both large and material to total revenue.

  • Example 3

    A cost exhibit shows fixed cost flat and variable cost rising.

    Approach

    Tie the trend to volume, supplier pricing, labor productivity, or mix.

    Answer

    The issue is likely unit economics, not overhead.

The exhibit answer formula

A strong exhibit answer has three sentences: what changed, why it matters, and what you would test next. This keeps the answer concise and prevents chart-reading from becoming a data tour.

View common mistakes

Common chart drill mistakes

These habits make exhibit answers longer but weaker.

  • Reading every number
    Lead with the largest pattern, then use numbers only to prove it.
  • Confusing observation with insight
    Observation is what the chart shows. Insight is what that means for the client.
  • No next test
    End with the analysis you would run next based on the exhibit.

Frequently asked questions

  • What is an exhibit in a case interview?

    An exhibit is a chart, table, or data page the interviewer gives you to interpret during the case.

  • How do I avoid over-explaining a chart?

    Use the observation-insight-so-what format and stop after the implication unless the interviewer asks for more detail.

  • Does the free drill include real charts?

    When the selected drill includes a mini-exhibit, the embedded drill renders it directly before your answer box.

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