A company is losing customers.
A retailer wants to enter a new country.
A business has increased revenue but its profits are falling.
What would you do?
These are examples of problems that may appear during a case interview.
Unlike questions about your previous experience, case interviews ask you to analyze a situation and build a solution with limited information.
Effective case interview prep is therefore about learning how to structure unfamiliar problems.
START BY UNDERSTANDING THE QUESTION
Do not immediately begin suggesting solutions.
First determine what the company is actually trying to achieve.
For example, if a company says sales are falling, clarify:
● Which product?
● Which market?
● Over what period?
● How large is the decline?
● Are competitors experiencing the same problem?
● Has pricing changed?
● Has customer demand changed?
● What is the company's objective?
A strong analysis begins with a clearly defined problem.
CREATE A STRUCTURE
Once you understand the situation, divide the problem into logical areas.
Imagine a company whose profits have fallen.
A basic structure might examine:
● Revenue
● Costs
Revenue could then be divided into:
● Price
● Number of customers
● Purchase frequency
● Products sold
Costs could include:
● Raw materials
● Salaries
● Rent
● Logistics
● Marketing
● Technology
Breaking a large question into smaller parts makes the problem easier to investigate.
DO NOT FORCE EVERY CASE INTO THE SAME FRAMEWORK
Frameworks can help during case interview preparation, but memorizing one structure for every possible problem can make your answers mechanical.
A market-entry case is different from a profitability problem.
A company considering international expansion might need to evaluate:
● Market size
● Customer demand
● Competition
● Regulations
● Entry costs
● Distribution
● Pricing
● Potential risks
Build your structure around the actual question.
EXPLAIN WHY YOU WANT INFORMATION
During a case interview, you may receive charts, numbers or additional information.
Do not simply request data randomly.
Explain what you are trying to investigate.
Instead of asking:
“Can I see sales?”
you could explain:
“I would first like to determine whether the decline comes from lower customer volume or lower spending per customer.”
This shows that your questions have a purpose.
BE COMFORTABLE WITH BASIC MATH
Some cases include calculations.
You might need to calculate:
● Profit
● Revenue
● Growth rate
● Market share
● Break-even point
● Average customer spending
● Percentage change
● Estimated market size
You usually do not need complicated mathematics.
The challenge is often identifying which calculation matters.
INTERPRET THE NUMBER AFTER CALCULATING IT
A calculation without interpretation is incomplete.
Suppose revenue fell from $10 million to $8 million.
Calculating a 20% decline is useful.
The next question is:
Why does that matter?
You might investigate whether the decline came from:
● Fewer customers
● Lower prices
● Reduced purchase frequency
● Loss of a major client
● A weaker product category
Numbers should move your analysis forward.
THINK ABOUT THE CUSTOMER
Business problems ultimately involve people making decisions.
Ask:
● Who is the customer?
● What do they value?
● Why do they buy?
● Why might they stop buying?
● What alternatives do they have?
● What would make them switch?
Even financially focused cases can become clearer when you understand customer behavior.
MAKE A CLEAR RECOMMENDATION
At the end of the case, do not simply repeat everything you discussed.
Give a concise recommendation.
A useful conclusion can include:
● Your recommended action
● Main evidence supporting it
● Major risk
● Suggested next step
For example:
“The company should delay entering the market because current demand appears insufficient to cover the projected entry cost. I would first test demand in two major cities before committing to a nationwide launch.”
Your recommendation should follow from your analysis.
PRACTICE CASES OUT LOUD
Reading case-study solutions can help you understand structures, but interviews require you to communicate while solving the problem.
During case interview practice, speak aloud.
Practise:
● Clarifying the problem
● Building a structure
● Explaining calculations
● Interpreting data
● Considering alternatives
● Giving a final recommendation
This also helps you notice when your reasoning sounds less clear aloud than it did in your head.
FINAL THOUGHTS
Successful case interview prep is not about memorizing dozens of business frameworks.
It is about developing a repeatable problem-solving process.
Understand the question.
Break the problem into logical parts.
Request relevant information.
Analyze the evidence.
Then make a clear recommendation.
The case may be unfamiliar.
Your method for approaching it does not have to be.