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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
90.8k 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
1.3k 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: Einrichtung eines Weinkellers
118.1k times solved
Difficulty: Beginner
Candidate-led
Profitability analysis
Ich denke darüber nach, in meinem Keller einen Weinkeller ein-zurichten. So wie ich das sehe, würde man die Re(...)
Ich denke darüber nach, in meinem Keller einen Weinkeller ein-zurichten. So wie ich das sehe, würde man die Regalfläche in zwei Bereich(...)

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
137.6k 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
Online travel booking
6.0k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Profitability analysis
An online travel agency earns a 10% commission on all of its bookings. Currently, their profits before taxes are $1 (...)
An online travel agency earns a 10% commission on all of its bookings. Currently, their profits before taxes are $1 m, while the industry average(...)
Company case by
BCG Platinion
BCG Platinion Case: Digital transformation of an entire corporation
22.5k times solved
Difficulty: Advanced
Interviewer-led
Digital transformation
Market analysis
Operations strategy
The CIO of a major insurance company needs your support to renew the company's IT landscape as a starting point for thei(...)
The CIO of a major insurance company needs your support to renew the company's IT landscape as a starting point for their digital transformation.The I(...)
Case by
PrepLounge
Spirits distribution
21.4k times solved
Difficulty: Beginner
Candidate-led
Operations strategy
Profitability analysis
Our client, Ooze, is one of the market leaders in the US spirits market (strong alcohol products).They are thinking of r(...)
Our client, Ooze, is one of the market leaders in the US spirits market (strong alcohol products).They are thinking of restructuring their distributio(...)
Case by
PrepLounge
Gas station
44.9k times solved
Difficulty: Intermediate
Interviewer-led
Market entry
Market sizing
How many gas stations are there in Paris? Suppose a friend of yours wants to open a gas station in Paris.(...)
How many gas stations are there in Paris? Suppose a friend of yours wants to open a gas station in Paris. What aspects should he consider?
Expert case by
MBB Unconventional Case: Coral Reefs
200+ 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(...)
Company case by
EY-Parthenon
EY-Parthenon Case: Virtual Marketplace
81.2k times solved
Difficulty: Intermediate
Candidate-led
Growth strategy
Profitability analysis
A leading online real estate marketplace in Germany – your-new-home.com – is struggling with stagnating sales after many(...)
A leading online real estate marketplace in Germany – your-new-home.com – is struggling with stagnating sales after many years of high growth rates. I(...)
Case by
PrepLounge
Barb's BBQ Booth
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(...)
Case by
PrepLounge
Essen für die Schüler?
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(...)
Case by
PrepLounge
Disguise distribution
38.4k times solved
Difficulty: Beginner
Candidate-led
Market analysis
Operations strategy
Profitability analysis
Your client is a German manufacturer of disguises for events and parties called KostümCo. They segment their products in(...)
Your client is a German manufacturer of disguises for events and parties called KostümCo. They segment their products in two lines: round-the-year and(...)
Case by
PrepLounge
Bookl
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(...)
Case by
PrepLounge
Advanced LBO Interview Questions for Finance
100+ times solved
Difficulty: Advanced
Interviewer-led
Mergers & Acquisition
This question set helps you deepen your understanding of LBO modeling by covering key mechanics such as capital structur(...)
This question set helps you deepen your understanding of LBO modeling by covering key mechanics such as capital structure, debt repayment flows, purch(...)
Expert case by
Sprinker
25.9k times solved
Difficulty: Beginner
Candidate-led
Competitive response
Growth strategy
Market analysis
Market entry
Market sizing
New product
Profitability analysis
Sprinker is a mid-sized, US-based publishing agency that develops, produces, and sells educational materials. It has com(...)
Sprinker is a mid-sized, US-based publishing agency that develops, produces, and sells educational materials. It has come to their attention that some(...)
Company case by
Roland Berger
Roland Berger Case: Onlinestar
111.6k 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
Advanced Accounting Interview Questions for Finance
200+ times solved
Difficulty: Advanced
Interviewer-led
Audit
This question set sharpens your understanding of advanced accounting topics essential for finance roles. It covers areas(...)
This question set sharpens your understanding of advanced accounting topics essential for finance roles. It covers areas like stock-based compensation(...)
Expert case by
New
BCG Beginner Case: Fashion startup
< 100 times solved
Difficulty: Beginner
Interviewer-led
Growth strategy
Your client is a D2C (direct to customer) online fashion business in a developing country. It is a new brand, launched a(...)
Your client is a D2C (direct to customer) online fashion business in a developing country. It is a new brand, launched about 2 years ago and founded b(...)
Expert case by
McKinsey Unconventional Case: Inclusive Cafes
300+ 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(...)
Expert case by
Revolut Mock Interview: Strategy & Operations
200+ 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
American Airlinks
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(...)

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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