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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
GamingHub
4.2
11.0k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Our client, GamingHub, is a large diversified entertainment corporation that received a request to approve a $200 m capi(...)
Our client, GamingHub, is a large diversified entertainment corporation that received a request to approve a $200 m capital allocation from its video(...)
Case by
PrepLounge
Basic Accounting Interview Questions for Finance
5.0
300+ times solved
Difficulty: Beginner
Interviewer-led
Audit
This set of questions is designed to help you master key concepts in accounting and financial analysis. The difficulty p(...)
This set of questions is designed to help you master key concepts in accounting and financial analysis. The difficulty progresses from foundational qu(...)
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(...)
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(...)
Company case by
zeb Consulting
zeb case: Quo vadis, customer?
4.3
79.9k times solved
Difficulty: Advanced
Candidate-led
Operations strategy
Profitability analysis
The bank "His Earlship Charles", a domestic retail and private bank is in a difficult situation. Profits have been decli(...)
The bank "His Earlship Charles", a domestic retail and private bank is in a difficult situation. Profits have been declining over the past years due t(...)
Case by
PrepLounge
Energy Sector Valuation & Interview Questions for Finance
5.0
< 100 times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
Valuing energy and natural resources companies is very different from other industries. Commodity price swings, capital(...)
Valuing energy and natural resources companies is very different from other industries. Commodity price swings, capital intensity, and the role of res(...)
Expert case by
Grain Co-operative – Brand Launch
4.3
4.6k times solved
Difficulty: Intermediate
Interviewer-led
Market sizing
New product
Pricing
MeGrain is a co-operative of 5000 farmers in the central part of India. As a co-operative, the farmers came together to(...)
MeGrain is a co-operative of 5000 farmers in the central part of India. As a co-operative, the farmers came together to sell the grains to retailers a(...)
Case by
PrepLounge
Derivatives & Hedging – Interview Questions for Finance
5.0
< 100 times solved
Difficulty: Advanced
Interviewer-led
Mergers & Acquisition
This question set explores how companies use forwards, swaps, and options in practice to manage risk. You’ll cover theor(...)
This question set explores how companies use forwards, swaps, and options in practice to manage risk. You’ll cover theory, applications, and calculati(...)
Case by
PrepLounge
Gambling Business
4.3
11.9k times solved
Difficulty: Intermediate
Interviewer-led
Competitive response
Market entry
Profitability analysis
Poker Inc. is currently operating four casinos in Royal City. Competitors are right now planning to open up a rival casi(...)
Poker Inc. is currently operating four casinos in Royal City. Competitors are right now planning to open up a rival casino in Kingsville.Poker Inc. ha(...)
Expert case by
Sandwich Bags
4.4
11.0k times solved
Difficulty: Intermediate
Interviewer-led
Capacity change
Market analysis
New product
Pricing
Profitability analysis
ConsumerPackagingCo is a small, US-based consumer products packaging company that develops, produces, and sells plastic(...)
ConsumerPackagingCo is a small, US-based consumer products packaging company that develops, produces, and sells plastic bags for storing sandwiches. T(...)
Case by
PrepLounge
Fashion mail order
4.3
22.5k times solved
Difficulty: Beginner
Candidate-led
Growth strategy
Market analysis
Profitability analysis
Your client is a direct mail clothing retailer. They primarily sell clothes through their product catalog. Nex(...)
Your client is a direct mail clothing retailer. They primarily sell clothes through their product catalog. Next year, postage costs will inc(...)
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
BCG - YodaPhone
4.4
12.9k times solved
Difficulty: Intermediate
Candidate-led
Operations strategy
Our client is Yoda's Phones, a national telecommunications company. They have embarked on a three-year, multi-million do(...)
Our client is Yoda's Phones, a national telecommunications company. They have embarked on a three-year, multi-million dollar digitization program. Unf(...)
Expert case by
MBB - Taxis in Manhattan
3.5
5.9k times solved
Difficulty: Intermediate
Interviewer-led
Brain teaser
Market entry
Market sizing
An entrepreneur has come to you looking to disrupt the taxi industry in NYC. They are interested in determining the numb(...)
An entrepreneur has come to you looking to disrupt the taxi industry in NYC. They are interested in determining the number of taxis in Manhattan, in o(...)
Expert case by
Grocery Wholesaler
5.0
13.6k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Profitability analysis
GroceryWholesaleCo is a leading international grocery wholesaler that sells, markets, and distributes food products, equ(...)
GroceryWholesaleCo is a leading international grocery wholesaler that sells, markets, and distributes food products, equipment, and supplies to restau(...)
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
Simon-Kucher
Simon-Kucher Case: GST Cruise Company
4.5
71.7k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Pricing
Cruise company German Sea Tours (GST) is a successful operator of international cruises. GST currently offers several cr(...)
Cruise company German Sea Tours (GST) is a successful operator of international cruises. GST currently offers several cruise trips, lasting between 5(...)
Case by
PrepLounge
Bookl
4.1
12.5k times solved
Difficulty: Intermediate
Interviewer-led
Capacity change
Operations strategy
Your client, Bookl, is a publishing company with stable sales in terms of both volume and price.Its distribution warehou(...)
Your client, Bookl, is a publishing company with stable sales in terms of both volume and price.Its distribution warehouse is reaching maximum capacit(...)

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:

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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
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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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