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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
Roland Berger
Roland Berger Case: Onlinestar
4.2
109.4k 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(...)
Case by
PrepLounge
Debt & Credit Analysis – Interview Questions for Finance
5.0
< 100 times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
This question set covers the fundamentals of debt instruments, credit metrics, and risk assessment. It mixes definitions(...)
This question set covers the fundamentals of debt instruments, credit metrics, and risk assessment. It mixes definitions, calculations, and case-style(...)
Case by
PrepLounge
Working Capital & Cash Flow Interview Questions for Finance
0.0
200+ times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
Operations strategy
Working capital and cash flow are core drivers of a company’s liquidity and financial health, and they frequently come u(...)
Working capital and cash flow are core drivers of a company’s liquidity and financial health, and they frequently come up in finance interviews. This(...)
Company case by
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
4.5
55.3k 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
Based on Bain 1st Round Case (2023): Last Mile Delivery
4.4
4.8k times solved
Difficulty: Advanced
Interviewer-led
Brain teaser
Growth strategy
Market analysis
Market entry
Market sizing
New product
Operations strategy
Pricing
Profitability analysis
A startup company specializing in last mile delivery with drones is determined to reach $20M in revenue while also becom(...)
A startup company specializing in last mile delivery with drones is determined to reach $20M in revenue while also becoming profitable. The company's(...)
MBMC Case: Exploring the future of automotive mobility
3.7
10.0k times solved
Difficulty: Intermediate
Interviewer-led
New product
Profitability analysis
As a consultant at Mercedes-Benz Management Consulting (MBMC), you are actively shaping the future of automotive mobilit(...)
As a consultant at Mercedes-Benz Management Consulting (MBMC), you are actively shaping the future of automotive mobility. While you are contributing(...)
Company case by
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
4.4
135.7k 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(...)
Expert case by
Swiss Coffins – The Death Business
4.6
2.6k times solved
Difficulty: Advanced
Candidate-led
Brain teaser
Growth strategy
Market analysis
Market sizing
Operations strategy
Your client is  the CEO of a coffin manufacturing company based in Geneva, Switzerland (Europe). The comp(...)
Your client is  the CEO of a coffin manufacturing company based in Geneva, Switzerland (Europe). The company has existed with little ch(...)
Case by
PrepLounge
The Madhouse Animation Crisis
4.2
6.7k times solved
Difficulty: Advanced
Candidate-led
Competitive response
New product
Profitability analysis
Your client is Madhouse Studios, one of the largest anime producers in Japan. The anime-industry is flourishing. Origina(...)
Your client is Madhouse Studios, one of the largest anime producers in Japan. The anime-industry is flourishing. Originally revenue was generated main(...)
Company case by
E.ON Inhouse Consulting
E.ON Inhouse Consulting Case: E-Mobility
3.4
13.1k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Market entry
Market sizing
Profitability analysis
Climate change has become one of the biggest challenges in the 21st century, and with roughly 75% of all CO₂ emissions c(...)
Climate change has become one of the biggest challenges in the 21st century, and with roughly 75% of all CO₂ emissions coming from energy, this sector(...)
Case by
PrepLounge
Pharma R&D
4.4
64.2k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Operations strategy
Profitability analysis
Your client is a pharmaceutical company which is worried about the portfolio optimization of their R&D projects.They(...)
Your client is a pharmaceutical company which is worried about the portfolio optimization of their R&D projects.They hired us to investigate it an(...)
Case by
PrepLounge
Military helicopters
4.4
26.8k times solved
Difficulty: Beginner
Interviewer-led
Market analysis
Profitability analysis
Your client is BS Systems, a defence contractor situated in the US.They have contacted our company to advise them in the(...)
Your client is BS Systems, a defence contractor situated in the US.They have contacted our company to advise them in the selection of the location for(...)
Expert case by
BoxxFitness Gyms
4.5
4.0k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Market analysis
New product
Pricing
Profitability analysis
Our client is the CEO of BoxxFitness - a leading gym chain in the US with over 1,500 gyms. BoxxFitness is a premium gym(...)
Our client is the CEO of BoxxFitness - a leading gym chain in the US with over 1,500 gyms. BoxxFitness is a premium gym concept with an annual members(...)
Case by
PrepLounge
Perpetual motion
4.1
11.0k times solved
Difficulty: Advanced
Candidate-led
Market entry
Market sizing
New product
After a congress about general science in which you took part out of personal interest, a renowned scientist comes to ta(...)
After a congress about general science in which you took part out of personal interest, a renowned scientist comes to talk to you. He swears he i(...)
Expert case by
GlowMobile Goes Digital (McKinsey first-round)
4.9
5.6k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Growth strategy
Market analysis
Operations strategy
Organizational behavior
Restructuring
GlowMobile is a leading telecom operator with a strong presence in Southeast Asia. They sell regular products and servic(...)
GlowMobile is a leading telecom operator with a strong presence in Southeast Asia. They sell regular products and services that any telecom operator w(...)
Case by
PrepLounge
Essen für die Schüler?
4.5
5.9k times solved
Difficulty: Intermediate
Candidate-led
Market sizing
Profitability analysis
Ein Restaurantinhaber überlegt sich, Schulen mit Essen zu beliefern. Für seine Überlegungen würde er gerne wissen, wie v(...)
Ein Restaurantinhaber überlegt sich, Schulen mit Essen zu beliefern. Für seine Überlegungen würde er gerne wissen, wie viel Geld er verdienen würde, w(...)
Expert case by
BCG 1st Round Case – Water Flows [NEW]
4.3
9.0k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Valuation
Our client is a German-owned water provider company based in the southwest of the United States. As the biggest water pr(...)
Our client is a German-owned water provider company based in the southwest of the United States. As the biggest water provider in the region, they ser(...)
Case by
PrepLounge
Love thy neighbour as thyself
4.3
3.5k times solved
Difficulty: Intermediate
Candidate-led
Competitive response
Market analysis
Your client, Port-Pouri, is a discount retailer in Portugal having 130 stores spread throughout the country and thereby(...)
Your client, Port-Pouri, is a discount retailer in Portugal having 130 stores spread throughout the country and thereby being the largest player in th(...)
Case by
PrepLounge
ChemInt
4.0
7.7k times solved
Difficulty: Advanced
Interviewer-led
Competitive response
Market analysis
Operations strategy
Your client, ChemInt, is a global chemicals company that manufactures Ponsulene in some locations around the world.It ha(...)
Your client, ChemInt, is a global chemicals company that manufactures Ponsulene in some locations around the world.It has several joint ventures (JV)(...)

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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