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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
90.1k 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
117.6k 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
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
4.5
56.1k 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(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
4.2
109.9k 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(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
4.4
136.1k 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
American Airlinks
4.4
18.9k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
Your client American Airlinks has seen its inflight revenues stagnate for the past 3 years.     &nbs(...)
Your client American Airlinks has seen its inflight revenues stagnate for the past 3 years.          &nbs(...)
Company case by
Roland Berger
Roland Berger Case: Sensorio Hightech GmbH
3.3
20.8k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Market entry
Sensorio Hightech GmbH is a leading manufacturer of technically advanced consumer electronics sensors based in Germany w(...)
Sensorio Hightech GmbH is a leading manufacturer of technically advanced consumer electronics sensors based in Germany with EUR 500 m in revenues. It(...)
Case by
PrepLounge
21st Century Fox
4.1
23.2k times solved
Difficulty: Beginner
Interviewer-led
Market analysis
Profitability analysis
Our client is a leading TV/film studio. They are concerned about the part of their business that provides post-productio(...)
Our client is a leading TV/film studio. They are concerned about the part of their business that provides post-production services internally as well(...)
Expert case by
COVID-19 impact on Heathrow Airport
4.4
9.8k times solved
Difficulty: Intermediate
Interviewer-led
Brain teaser
Market analysis
Operations strategy
Profitability analysis
Your client is the CEO of Heathrow airport (London), the busiest airport in Europe in terms of commercial traffic.Due to(...)
Your client is the CEO of Heathrow airport (London), the busiest airport in Europe in terms of commercial traffic.Due to COVID-19, the airport's opera(...)
Expert case by
BCG Round 1 Case: Telecommunication Troubles
5.0
1.1k times solved
Difficulty: Intermediate
Candidate-led
Profitability analysis
Your client, Convo Telco, is a leading national telecommunications player in a developing country. They offer both mobil(...)
Your client, Convo Telco, is a leading national telecommunications player in a developing country. They offer both mobile and fixed (e.g. broadband, i(...)
Case by
PrepLounge
Toothbrush disruption
4.3
13.5k times solved
Difficulty: Intermediate
Candidate-led
Competitive response
New product
Profitability analysis
We are a global toothbrush producing company. Our portfolio consists of two kinds of toothbrushes - 'manual' that sells(...)
We are a global toothbrush producing company. Our portfolio consists of two kinds of toothbrushes - 'manual' that sells for $5 and an electric 'r(...)
Case by
PrepLounge
Laos Tire
4.4
9.3k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Market analysis
Profitability analysis
A manufacturer of tires in Laos has had a monopoly in the market for years due to high tariff on imports. If foreign pro(...)
A manufacturer of tires in Laos has had a monopoly in the market for years due to high tariff on imports. If foreign producers wanted to import tires,(...)
Case by
PrepLounge
Barb's BBQ Booth
4.5
13.5k times solved
Difficulty: Beginner
Candidate-led
Market analysis
Profitability analysis
One day you are grocery shopping when you are approached by Barb B. Queue, the owner of the supermarket’s deli shop. Fac(...)
One day you are grocery shopping when you are approached by Barb B. Queue, the owner of the supermarket’s deli shop. Facing serious competition from o(...)
Expert case by
Bain + BCG Hot Wheels - Part 2 WITH VIDEO SOLUTION
4.3
6.5k times solved
Difficulty: Beginner
Candidate-led
Market analysis
Profitability analysis
Our client is Korean Car Parts (KCP), a multi-national original equipment manufacturer (OEM) of car parts based in(...)
Our client is Korean Car Parts (KCP), a multi-national original equipment manufacturer (OEM) of car parts based in Korea. They've recently seen a(...)
Case by
PrepLounge
Children vaccine
4.4
62.6k times solved
Difficulty: Advanced
Candidate-led
Market entry
Market sizing
New product
Beyer, one of the biggest pharmaceutical companies in the world, just invented a very reliable vaccine against Chickenpo(...)
Beyer, one of the biggest pharmaceutical companies in the world, just invented a very reliable vaccine against Chickenpox, a disease that affects chil(...)
Case by
PrepLounge
Italian Beauty Company
4.3
11.8k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Profitability analysis
Your client is Italian Beauty Company (IBC), a high quality beauty products company. It is well established in Italy.One(...)
Your client is Italian Beauty Company (IBC), a high quality beauty products company. It is well established in Italy.One of their major product lines&(...)
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
Unified Health
4.3
20.4k times solved
Difficulty: Intermediate
Interviewer-led
Profitability analysis
Public sector
Our client is Unified Health, a health care company in the US. It insures patients and provides health care services. Em(...)
Our client is Unified Health, a health care company in the US. It insures patients and provides health care services. Employers pay a premium to UH fo(...)
Company case by
FTI-Andersch AG
FTI-Andersch AG Case: Turnaround – Global Plastics AG
5.0
1.2k times solved
Difficulty: Beginner
Candidate-led
Restructuring
Sie wurden vom Vorstand der Global Plastics AG beauftragt, die wirtschaftliche Performance der Unternehmens-Gruppe im Ra(...)
Sie wurden vom Vorstand der Global Plastics AG beauftragt, die wirtschaftliche Performance der Unternehmens-Gruppe im Rahmen eines Independent Busines(...)
Expert case by
Bain Case Style - Growth offensive at ChemCorp [NEW]
4.3
8.8k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Your client is the Performance Chemicals division (revenues of $500 million) of a Specialty Chemicals Company with total(...)
Your client is the Performance Chemicals division (revenues of $500 million) of a Specialty Chemicals Company with total revenues of $14 billion. The(...)
Case by
PrepLounge
Deep Water Rescue
3.2
2.3k times solved
Difficulty: Advanced
Candidate-led
Market analysis
Profitability analysis
Deep water is a European manufacturer of small yachts and premium boats for private customers. The company operates in E(...)
Deep water is a European manufacturer of small yachts and premium boats for private customers. The company operates in Europe and the Middle East and(...)

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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