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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. 

Company case by
DHL Consulting
DHL Consulting case: Bike Shop
90.5k 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
1.2k 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
117.8k 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
136.8k 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
Paper Print
17.5k times solved
Difficulty: Intermediate
Interviewer-led
Mergers & Acquisition
A printing company is planning to take over another printing company with similar technology and printing machines. The(...)
A printing company is planning to take over another printing company with similar technology and printing machines. The candidate is supposed to evalu(...)
Company case by
Stern Stewart & Co.
Stern Stewart Case: TexGroup – Breaking the crisis of a traditional textile company
6.6k times solved
Difficulty: Advanced
Candidate-led
Restructuring
TexGroup is a family-owned German heritage company, now in its third generation of leadership. Specializing in high-qual(...)
TexGroup is a family-owned German heritage company, now in its third generation of leadership. Specializing in high-quality, Made-in-Germany textiles,(...)
Expert case by
Business Strategy: Home Delivery Solution for Retailer Chain
2.0k times solved
Difficulty: Advanced
Candidate-led
Competitive response
Growth strategy
Mergers & Acquisition
Operations strategy
Kadara, a privately-held US retailer active in the Midwest with annual sales of approximately USD 3 bn, is trying to fig(...)
Kadara, a privately-held US retailer active in the Midwest with annual sales of approximately USD 3 bn, is trying to figure out a solution to last-mil(...)
Case by
PrepLounge
Wohin mit den Schränken?
4.7k times solved
Difficulty: Intermediate
Interviewer-led
Capacity change
Growth strategy
Operations strategy
Der Klient, OSEKA, ist ein profitabler Möbelhersteller aus Spanien. Bisher liefert er seine - in Spanien hergestellten -(...)
Der Klient, OSEKA, ist ein profitabler Möbelhersteller aus Spanien. Bisher liefert er seine - in Spanien hergestellten - Möbel auch nur nach Spanien.(...)
Case by
PrepLounge
Music Streaming - Market Sizing
9.3k times solved
Difficulty: Beginner
Interviewer-led
Brain teaser
Market sizing
Profitability analysis
Your friend is an aspiring artist and is asking for your consulting advise on a problem that he has been struggling with(...)
Your friend is an aspiring artist and is asking for your consulting advise on a problem that he has been struggling with. Your friend (the artist) is(...)
Case by
PrepLounge
Telephony Technology Warehouser
4.8k times solved
Difficulty: Intermediate
Candidate-led
Market analysis
Profitability analysis
We are a warehouser (B2B) and have been facing a decline in profits since past 2 years. We would like you to figure out(...)
We are a warehouser (B2B) and have been facing a decline in profits since past 2 years. We would like you to figure out why this is happening and prov(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
110.7k 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
McKinsey Unconventional Case: Inclusive Cafes
200+ times solved
Difficulty: Intermediate
Interviewer-led
Non-conventional
Your client is a leading retail coffee chain. They are present in several countries globally and are a popular brand in(...)
Your client is a leading retail coffee chain. They are present in several countries globally and are a popular brand in most of the markets that they(...)
Case by
PrepLounge
Smart Meters
35.2k 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?
57.7k 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(...)
Case by
PrepLounge
Health Coaches
20.6k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
Profitability analysis
Public sector
Our client is a large national health care payer (health insurance company, e.g. Aetna) exploring the launch of a new di(...)
Our client is a large national health care payer (health insurance company, e.g. Aetna) exploring the launch of a new disease management program to be(...)
Expert case by
New
Revolut Mock Interview: Strategy & Operations
< 100 times solved
Difficulty: Advanced
Interviewer-led
Operations strategy
You are part of the Strategy & Operations team at Revolut.Revolut has had significant growth over the past couple of(...)
You are part of the Strategy & Operations team at Revolut.Revolut has had significant growth over the past couple of years, with customer base gro(...)
Company case by
Bain & Company
Bain Case: Old Winery
141.9k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Market analysis
Market sizing
Mergers & Acquisition
You have inherited the “Old Winery” from your grandfather, a winery that has been family-owned for five generations and(...)
You have inherited the “Old Winery” from your grandfather, a winery that has been family-owned for five generations and can be dated back to the 16th(...)
Case by
PrepLounge
Spain Shipping
5.1k 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
Practical LBO Interview Questions for Finance
300+ 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(...)
Expert case by
Winter Wall Revival: Advising Knight’s Watch Municipality on Public Sector Strategy
800+ times solved
Difficulty: Intermediate
Candidate-led
Non-conventional
Operations strategy
Public sector
Your client is the Knight’s Watch Municipality. Their governor, John Snow, has engaged you, explaining that an evil army(...)
Your client is the Knight’s Watch Municipality. Their governor, John Snow, has engaged you, explaining that an evil army composed of White Walkers pla(...)
Case by
PrepLounge
Europe Rail Tunnel
5.3k times solved
Difficulty: Beginner
Candidate-led
Competitive response
Market analysis
The airlines covering the Cologne to London route are facing a competitive threat from a new rail tunnel connecting Brit(...)
The airlines covering the Cologne to London route are facing a competitive threat from a new rail tunnel connecting Britain and Germany by train. (...)
Case by
PrepLounge
Vorsprung durch Marge
4.5k times solved
Difficulty: Advanced
Interviewer-led
Growth strategy
Profitability analysis
Dein Klient ist der Vorstandsvorsitzende eines großen Automobilkonzerns. Er möchte, dass Du ihm hilfst, die Gewinnmarge(...)
Dein Klient ist der Vorstandsvorsitzende eines großen Automobilkonzerns. Er möchte, dass Du ihm hilfst, die Gewinnmarge seines Unternehmens zu verbessern.

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. 🚀

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