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The Case Interview Format

When applying to top consulting firms, one of the most crucial stages of the interview process is the case interview. This format is designed to assess your analytical competencies, problem-solving skills, and ability to think strategically under pressure. Let's take a look at what to expect.  
 

 

Structure of a Case Interview

A case interview is a 30-minute simulation of a typical business project that consultants may have worked on. Cases provide a real example of an on-the-job experience and the assumption is that if a candidate is successfully able to tackle a case interview, he or she is also more likely to be a successful management consultant.

Case studies are the most important and usually the longest part of consulting interviews. In addition to the case study, the interview typically includes introductory small talk, a personal fit interview, and closing questions (see the illustration below).

The graph shows the process of a case-interview, based on 4 steps.

Many companies review and standardize their consulting cases prior to a real interview to ensure that the case is neither too difficult nor too easy. Companies also ensure that a variety of skills are tested during the interviews.

 

The Typical Flow of a Case Interview

The case interview typically follows a structured flow to ensure that both the interviewer and the candidate cover all necessary aspects of the business problem. It involves the following phases:

1. Case Presentation and Problem Understanding

To start off, the interviewer will present a specific business problem or scenario. This could range from market entry considerations, to profitability issues, or organizational changes. The problem is usually based on real-world business issues that the consulting firm dealt with in the past.

You are expected to listen carefully, take notes, and clarify any points that are not clear to fully understand the scope and context of the problem.

👉 To get a better feeling for possible case prompts, check out the following beginner cases. 

Case by
PrepLounge
DHL Consulting case: Bike Shop
4.4
90.0k times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Profitability analysis
You have been hired to support the owner of a bike-shop as a business consultant. The bike-shop has suffered a sign(...)
You have been hired to support the owner of a bike-shop as a business consultant. The bike-shop has suffered a significant revenue decline during(...)
Expert case by
FastFood Chain Turnaround
5.0
1.1k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has enc(...)
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenge(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Setting up a Wine Cellar
4.1
117.4k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
I’m thinking about setting up a wine cellar in my basement. The way I see it, shelf space would be divided into two sect(...)
I’m thinking about setting up a wine cellar in my basement. The way I see it, shelf space would be divided into two sections: (1) a “drinking” section(...)

2. Framework Development

Afterwards, you outline a structured approach or framework to tackle the problem. Common frameworks include the SWOT analysis, Porter’s Five Forces, or the 4P's, with which you can structure your information. This step demonstrates your ability to break down complex issues into manageable parts.

However, keep in mind that it is not enough to simply memorize the standard framework concepts. While standard frameworks are useful for a rudimentary outline of a case problem, they need to be optimized and adapted to the individual case. Don't worry, as this is a skill you can develop, but it definitely requires thorough preparation and practice

Once you have crafted your structure, clearly explain your framework to the interviewer, ensuring he or she understands your thought process and logical flow.

3. Analysis and Problem Solving

Next, you dive into the analysis. During the interview, your interviewer may provide additional data, charts or exhibits. Analyze this information to support your framework and build your argument. Formulate hypotheses based on your analysis and test them against the data provided. If needed, adjust your approach based on your new findings.

During the quantitative analysis, perform the necessary calculations to support your findings. This could include market sizing estimations, profitability calculations or a cost analysis. Good mental math skills will definitely help in this phase. 

4. Recommendations

Once you have worked through your structure, provide clear, and actionable recommendations based on your analysis. Use the Pyramid Principle of communication, highlight your key findings and explain how they address the problem.

You should also be ready to justify your suggestions with evidence from your analysis (i. e. data) and discuss possible next steps or further areas of investigation that the client may wish to consider.

After all, the interviewer may question your conclusions or ask for further clarification. Be prepared to defend your recommendations and discuss alternative perspectives. 

After, all the best way to prepare for your interview is practice. Explore our Case Library with real examples now!

Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
4.4
135.8k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Operations strategy
Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilo(...)
Your client, large automotive OEM WyCar, has developed its first fully electric vehicle (EV) and introduced it as a pilot on the Austrian market last(...)
Case by
PrepLounge
Advanced Accounting Interview Questions for Finance
5.0
200+ times solved
Difficulty: Advanced
Interviewer-led
Audit
This question set sharpens your understanding of advanced accounting topics essential for finance roles. It covers areas(...)
This question set sharpens your understanding of advanced accounting topics essential for finance roles. It covers areas like stock-based compensation(...)
RSM Ebner Stolz Case: Noch zu retten?
3.1
12.0k times solved
Difficulty: Intermediate
Interviewer-led
Operations strategy
Profitability analysis
Sie werden vom Management der mittelständischen Packaging-Group gebeten, eine Einschätzung zur wirtschaftlichen Lage des(...)
Sie werden vom Management der mittelständischen Packaging-Group gebeten, eine Einschätzung zur wirtschaftlichen Lage des Konzerns abzugeben. Im Rahmen(...)
Case by
PrepLounge
Was machen wir mit der Datenflut?
4.3
3.9k times solved
Difficulty: Intermediate
Interviewer-led
New product
Operations strategy
Profitability analysis
Dein Kunde ist ein großer Automobilkonzern. Dieser erhält eine große Menge an Daten von den verkauften Autos. Er mö(...)
Dein Kunde ist ein großer Automobilkonzern. Dieser erhält eine große Menge an Daten von den verkauften Autos. Er möchte von Dir wissen, welche Mö(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
4.2
109.5k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Profitability analysis
Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years(...)
Onlinestar, an online retailer of furniture and garden products (core business), has grown significantly in recent years as a result of an expansion o(...)
Expert case by
FastFood Chain Turnaround
5.0
1.1k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has enc(...)
Our client (FastFood Co) is a fast-food company that has > 20 restaurants in the city. Recently, the business has encountered significant challenge(...)
Case by
PrepLounge
Carmatics
4.3
18.5k times solved
Difficulty: Beginner
Candidate-led
Market analysis
Market entry
Market sizing
Your client, Virgin Mobile, is interested in offering telematics services to vehicles in the USA with a new brand: Carma(...)
Your client, Virgin Mobile, is interested in offering telematics services to vehicles in the USA with a new brand: Carmatics.Should they enter this ne(...)
Expert case by
MBB Case - Sierra Springs
5.0
2.6k times solved
Difficulty: Intermediate
Interviewer-led
New product
Our client is Sierra Springs, a top 3 spring water producer in the U.S. The company owns the entire bottled-water produc(...)
Our client is Sierra Springs, a top 3 spring water producer in the U.S. The company owns the entire bottled-water production supply chain, including w(...)
Case by
PrepLounge
China book publisher
4.3
5.4k times solved
Difficulty: Beginner
Candidate-led
Market sizing
Profitability analysis
Our client is a Chinese publisher called AnimeCo who is looking to publish a new book based on the popular Anime series(...)
Our client is a Chinese publisher called AnimeCo who is looking to publish a new book based on the popular Anime series Little Panda. This series has(...)
Case by
PrepLounge
Disguise distribution
4.4
38.4k times solved
Difficulty: Beginner
Candidate-led
Market analysis
Operations strategy
Profitability analysis
Your client is a German manufacturer of disguises for events and parties called KostümCo. They segment their products in(...)
Your client is a German manufacturer of disguises for events and parties called KostümCo. They segment their products in two lines: round-the-year and(...)
Case by
PrepLounge
Practical LBO Interview Questions for Finance
5.0
200+ times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
Valuation
This set of questions helps you apply key LBO concepts in practical, realistic interview scenarios. You'll explore how l(...)
This set of questions helps you apply key LBO concepts in practical, realistic interview scenarios. You'll explore how leveraged buyout logic is used(...)
Company case by
Volkswagen Group Consulting
Volkswagen Group Consulting Case: Wo soll produziert werden?
4.3
14.0k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
New product
Pricing
Ihr Kunde ist in einem globalen Automobilkonzern dafür verantwortlich ein neues Produkt mit einem Volumen von 140.000 Fa(...)
Ihr Kunde ist in einem globalen Automobilkonzern dafür verantwortlich ein neues Produkt mit einem Volumen von 140.000 Fahrzeugen über den gesamten Pro(...)
Expert case by
Poliglot Language App Needs Users
4.6
3.5k times solved
Difficulty: Intermediate
Interviewer-led
Capacity change
Growth strategy
Market analysis
Market sizing
Operations strategy
Organizational behavior
Let’s assume our client is Poliglot, a popular language app. Poliglot is five years old, originally from the US, but ava(...)
Let’s assume our client is Poliglot, a popular language app. Poliglot is five years old, originally from the US, but available worldwide. The app curr(...)
Case by
PrepLounge
Smart Meters
4.4
35.1k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Market entry
New product
Operations strategy
Profitability analysis
The municipal utility Hamburg Energized is a local energy retail (power and gas) and distribution grid company active in(...)
The municipal utility Hamburg Energized is a local energy retail (power and gas) and distribution grid company active in the city of Hamburg. The majo(...)
Company case by
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
4.5
55.4k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been strug(...)
Our client BeautyCo is a large European perfumery company with 500 shops across Europe. However, BeautyCo has been struggling with a decrease in profi(...)
Expert case by
Changes in cookies market
4.1
5.4k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Market analysis
Market sizing
Operations strategy
Profitability analysis
Your client is a US-based manufacturer of branded cookies, Gumbread Inc. The client realized that their sales have decli(...)
Your client is a US-based manufacturer of branded cookies, Gumbread Inc. The client realized that their sales have declined in recent years. The clien(...)
Expert case by
Hara Coffee Co's innovative coffee subscription model
3.5
1.5k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Growth strategy
Market entry
New product
Profitability analysis
Sustainability
Our client, Hara Coffee Company, is a large coffee chain with over 200 locations in the United Kingdom. They import bean(...)
Our client, Hara Coffee Company, is a large coffee chain with over 200 locations in the United Kingdom. They import beans from numerous regions and ba(...)
Case by
PrepLounge
Spain Shipping
4.2
5.0k times solved
Difficulty: Beginner
Candidate-led
Operations strategy
Profitability analysis
Our client is a local shipping firm in Spain where they handle local shipping of packages delivered by international shi(...)
Our client is a local shipping firm in Spain where they handle local shipping of packages delivered by international shipping firms like FedEx, UPS &a(...)
Case by
PrepLounge
From online to offline
3.7
4.8k times solved
Difficulty: Beginner
Candidate-led
Operations strategy
We are thinking of establishing a door-to-door distribution of an existing online newspaper in Kolkata, India. We haven'(...)
We are thinking of establishing a door-to-door distribution of an existing online newspaper in Kolkata, India. We haven't spent much time on how the p(...)

Key Takeaways for Your Case Interview Success

Mastering the case interview is a crucial step in securing a consulting job. To perform well, you need to demonstrate structured thinking, analytical skills, and clear communication while solving a real-world business problem.

The interview typically follows a structured flow, starting with an introduction and resume discussion, followed by the case presentation, where you clarify the problem and outline a logical framework. From there, you analyze data, test hypotheses, and apply quantitative skills to arrive at well-supported recommendations. Finally, you summarize your findings and engage in a discussion to defend your approach.

Success in case interviews comes down to practice. Familiarizing yourself with common frameworks is useful, but true preparation involves adapting them to different cases, improving your problem-solving speed, and refining your communication. By structuring your thoughts clearly, staying flexible in your approach, and confidently presenting your findings, you’ll increase your chances of impressing your interviewer and landing an offer at a top consulting firm. 🚀

Let's Move On With the Next Articles:

The Personal Fit Interview
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The personal fit interview is a crucial part of the selection process in consulting. It’s often underestimated by candidates who tend to focus on the challenging case interviews only. But the personal fit interview is just as important! It’s all about determining if you’ll fit well within the team and align with the company culture. Read this article to find out why the personal fit interview matters so much and how to prepare effectively.
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Key Questions in the Personal Fit Interview
General Info: Your Starting Point for the Case Interview Preparation
Consulting interviews are not just about your skills and knowledge — companies also want to see how well you align with their culture and values, often called "personal fit". This part of the interview is your chance to show you’re a natural addition to the team.Here’s a look at three common personal fit questions and some tips on how to answer them confidently and thoughtfully.
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Interviewer- vs. Candidate-Led Cases
General Info: Your Starting Point for the Case Interview Preparation
Every case interview has a certain structure. An important factor on how your case interview is going to proceed is if the interview is interviewer-led or candidate-led.We’d like to explain the two interview formats – candidate-led cases and interviewer-led cases – highlight their differences, and provide you with tips on how to excel in each of them.
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