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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
117.9k 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
111.0k 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
Eyes Inc.
13.4k times solved
Difficulty: Advanced
Candidate-led
Growth strategy
Market analysis
Profitability analysis
Your client, Eyes Inc., is a contact lens manufacturer situated in the US. They seek to increase their market share over(...)
Your client, Eyes Inc., is a contact lens manufacturer situated in the US. They seek to increase their market share over the next two years and asked(...)
Company case by
Bain & Company
Bain Case: BeautyCo – Where Did the Profits Go?
58.2k 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
MBB 1st Round Case - Hazella Light
6.6k times solved
Difficulty: Advanced
Candidate-led
Growth strategy
Market analysis
Market sizing
New product
Pricing
Profitability analysis
Sustainability
Our client is an Italian multinational manufacturer of branded chocolate and confectionery products. One of their most p(...)
Our client is an Italian multinational manufacturer of branded chocolate and confectionery products. One of their most popular products is Hazella, a(...)
Case by
PrepLounge
Unified Health
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
Oliver Wyman
Oliver Wyman Case: Full Electrons Ahead
137.0k 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
MBB Second Round - Fashion Market Expansion
800+ times solved
Difficulty: Advanced
Candidate-led
Market entry
Our client is Chic & Stitch. They make tailor-made clothes for modern women. They focus on quality and fit. Their wo(...)
Our client is Chic & Stitch. They make tailor-made clothes for modern women. They focus on quality and fit. Their work covers design, retail, and(...)
Case by
PrepLounge
Fast Food Pricing
7.5k times solved
Difficulty: Intermediate
Interviewer-led
Pricing
Profitability analysis
Our client is a global fast-food restaurant that offers a wide range of breakfast and rest of day products including bur(...)
Our client is a global fast-food restaurant that offers a wide range of breakfast and rest of day products including burgers, salads, fries, and bever(...)
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(...)
Company case by
E.ON Inhouse Consulting
E.ON Inhouse Consulting Case: E-Mobility
13.4k 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
From online to offline
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(...)
Expert case by
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(...)
Case by
PrepLounge
McBurger
15.4k times solved
Difficulty: Beginner
Interviewer-led
Profitability analysis
A large fast food chain has hired us to improve the company’s profitability by cutting costs. Before engaging in the ini(...)
A large fast food chain has hired us to improve the company’s profitability by cutting costs. Before engaging in the initial brainstorming session abo(...)
Case by
PrepLounge
Children vaccine
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
Diagnosis: Acquisition ache
13.0k times solved
Difficulty: Advanced
Candidate-led
Growth strategy
Market analysis
New product
Organizational behavior
Public sector
Your client is part of AtoZ Ltd., a diversified multinational company with a health care division that produces medical(...)
Your client is part of AtoZ Ltd., a diversified multinational company with a health care division that produces medical instruments and related servic(...)
Case by
PrepLounge
Working Capital & Cash Flow Interview Questions for Finance
300+ 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(...)
Case by
PrepLounge
Juice producer
5.1k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
A major juice producer sells packaged fruit juice to retail outlets. Normally, the juice is packed and sold in 16-ounce(...)
A major juice producer sells packaged fruit juice to retail outlets. Normally, the juice is packed and sold in 16-ounce carton containers, but recentl(...)
Case by
PrepLounge
Inverto Case: FashionForward’s Sourcing Shake-up
6.2k times solved
Difficulty: Intermediate
Interviewer-led
Market analysis
Operations strategy
FashionForward is a mid-sized, private-label fashion retailer headquartered in Europe with €600 million in annual revenu(...)
FashionForward is a mid-sized, private-label fashion retailer headquartered in Europe with €600 million in annual revenue. Its product portfolio inclu(...)
Expert case by
MBB Unconventional Case: Coral Reefs
100+ times solved
Difficulty: Advanced
Candidate-led
Non-conventional
Public sector
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including(...)
Your client is the Government of Indonesia, specifically a joint committee formed between a few key ministries including the Ministry of Marine Affair(...)

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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