Caseinterview

What It Really Means to Be Professional in Consulting (And Why It Matters)

Victor Cheng — Mon, 18 Aug 2025 19:13:34 +0000

When I was a McKinsey consultant, I worked with a client who once said, “You’re the most professional consultant I’ve worked with.” What he meant wasn’t about being formal or wearing a suit—it was about how I showed up, how I communicated, and how I made his life easier.

If you’re preparing for consulting interviews, or if you’re in industry and want to work with top-tier people, professionalism is a key differentiator.

What Does It Mean to Be Professional?

Professionalism means:

You show up on time.
You deliver what you promise.
You ask good questions—and actually listen to the answers.
You prepare ahead of time so others don’t have to bring you up to speed.
You don’t make excuses.
You don’t waste people’s time.

Professionalism also means:

You communicate clearly and concisely.
You write structured emails.
You’re respectful—especially when you disagree.
You dress appropriately for the setting.
You don’t overpromise. And you don’t underdeliver.

Why It Matters in Consulting

In consulting, time is expensive. When you’re on a team, everyone expects that you will get your work done—without needing hand-holding. When you meet with clients, your role is to inspire confidence. When you interview, your interviewer is asking, “Can I trust this person in front of my client next week?”

Every interaction is a test.

Being professional increases trust. It reduces friction. It makes people want to work with you again.

How to Practice Professionalism Before You’re Hired

Even if you’re still in school or early in your career, you can demonstrate professionalism:

Show up to case practice calls on time.
Send a thank-you message after someone helps you.
Follow through when you say you’ll do something.
Format your resume neatly and concisely.
Be concise in your emails.
Treat everyone with respect—even peers and juniors.

Final Thoughts

Being professional isn’t about being stiff or impersonal. It’s about showing up in a way that makes other people’s lives easier.

That’s a superpower in consulting—and in life.

The post What It Really Means to Be Professional in Consulting (And Why It Matters) first appeared on Caseinterview.

Money vs. Happiness: How to Choose a Career You’ll Love

Victor Cheng — Mon, 11 Aug 2025 06:00:00 +0000

One of the most common career questions I hear is this:

“Should I choose a career for the money or for the happiness?”

It’s a great question — because the right answer changes depending on your stage in life.

If you’re in survival mode — no safety net, no family support, and you need income to literally keep a roof over your head — your first priority is simple: choose the path that pays enough to meet your basic needs. In this stage, happiness takes a back seat to survival.

But once you’ve built a financial floor — where you’re not worried about food, rent, or utilities — you have the luxury to weigh money against meaning in a more balanced way.

Two Extremes — and Why They Often Fail

1. The “Do What You Hate for Decades” Plan
Some people pick a high-paying job they dislike, tough it out for 30+ years, and plan to “do what they love” in retirement.

I’ve seen this lead to midlife crises more often than it leads to satisfaction. The risk? You spend your best years drained and unfulfilled.

2. The “Follow Your Passion at All Costs” Plan
Others ignore money entirely and chase their passion from day one — artist, nonprofit work, or low-paying creative jobs.

This can be fulfilling… until financial stress turns that dream into a burden.

The Middle Path

The real sweet spot is earning enough to meet your needs (and ideally more), while genuinely liking the work you do.

There are two main ways to get there:

Separate Money from Meaning
Work a low-stress, stable job that covers your bills, and pursue your passions outside of work.
Example: Accountant by day, rock guitarist by night.
Find a “Likable” Career with Above-Average Pay
Maybe it’s not as prestigious or lucrative as investment banking or consulting, but you enjoy it enough to work harder, improve, and rise into the top 10% in your field — where the income can be surprisingly strong.

Why Enjoyment Matters

If you like your work, you’ll naturally put in more effort. And that extra effort makes it far more likely you’ll become a top performer — which almost always means better pay.

Being in the top 10% of a career you like beats being in the bottom 10% of one you hate, even if the “average” pay in the hated field looks higher on paper.

The Key Question

When choosing a career path, the most important thing is knowing yourself:

What do you need financially?
What do you value most?
What kinds of work energize you?

The answer isn’t about what your parents, peers, or society admire. It’s about your life. If you’re clear on those answers, you can usually find a way to make it work financially.

Bottom line: You can design a career that gives you both money and happiness. But it requires honesty about your needs, awareness of your options, and the willingness to aim for the top of the field you choose.

The post Money vs. Happiness: How to Choose a Career You’ll Love first appeared on Caseinterview.

Who Should Not Work in Consulting: 5 Red Flags to Watch For

Victor Cheng — Wed, 06 Aug 2025 18:53:19 +0000

At CaseInterview.com, we often talk about how to break into consulting and how to succeed once you’re in. But today, let’s talk about the opposite: who should not go into consulting in the first place.

This is a topic I don’t see discussed enough, and it’s important—because no matter how prestigious a consulting job might look on your resume, if it’s a bad fit, you’ll be miserable. Here are five clear signs consulting may not be for you:

1. You Hate Case Interviews

If you find case interviews draining, frustrating, or just plain miserable, stop right there. Case interviews simulate the actual job. If you dislike the format, you’ll likely dislike the real work, which consists of solving case-style problems 8–12 hours a day, 5–6 days a week.

2. You Dislike Math, Data, and Logic

Consulting is all about structured thinking, quantitative analysis, and logical problem-solving. If you’re someone who prefers ambiguity, gut instinct, or creative exploration over hard data and structured reasoning, this field will probably drive you nuts.

3. You’re a Highly Intuitive, Lateral Thinker

Being an intuitive thinker is not a bad thing—in fact, it’s a hallmark of many brilliant entrepreneurs. But in consulting, you have to prove every recommendation with evidence and structured logic. Visionary thinkers like Steve Jobs, for example, would have made terrible consultants. Consulting requires rigor over instinct.

4. You Value Work-Life Balance Above All Else

Let’s be real: consulting hours can be brutal. Even at the senior levels, it’s not uncommon to work late into the night. If a balanced lifestyle, evenings off, or weekends free are your non-negotiables, the consulting lifestyle will likely disappoint you.

5. You See Consulting as a Short-Term Stepping Stone

This one’s a bit of a gray area. If you see consulting as a 2-year stint to gain skills or pivot to another field, that can work. Many do exactly that and move into industry, grad school, or startups. But if you already know it’s not a long-term fit, go in with eyes wide open. Maximize what you get out of it—and plan your exit.

In Summary:

Consulting is an excellent fit for certain types of people—but it’s not for everyone. And that’s perfectly okay. There are many paths to success, and fulfillment comes from alignment with your strengths, values, and lifestyle preferences.

Knowing what not to do can be just as valuable as knowing what to pursue. Be honest with yourself, and choose wisely.

Want help figuring out if consulting is right for you? Explore our free resources at CaseInterview.com to get clarity and confidence in your career decisions.

The post Who Should Not Work in Consulting: 5 Red Flags to Watch For first appeared on Caseinterview.

How to Pass the BCG Online Case

Victor Cheng — Thu, 01 Aug 2024 17:19:48 +0000

What Is the BCG Online Case?

The BCG Online Case is an online case interview simulation that assesses a candidate’s problem-solving skills and analytical thinking abilities. It is designed to simulate a real-life client engagement, and consists of a single case study that the candidate must work through.

The case study typically involves a business situation where the candidate must analyze data, identify key issues, and propose solutions. The case may fall into one of several categories, such as:

1) Market entry strategy;
2) Pricing optimization;
3) Cost reduction; or
4) Growth strategy.

The duration of the BCG Online Case test ranges from 25 to 30 minutes, depending on the number of questions involved (normally 6-8 questions). Candidates are given a set of materials, including charts, graphs, and other data, and must use this information to answer a series of questions.

While time management is important, the focus should be on demonstrating strong analytical and problem-solving skills. BCG is more interested in the quality of your thought process and the insights you generate than in how quickly you complete the case.

What Does the BCG Online Case Test For?

The BCG Online Case bot is designed to test a candidate’s analytical and problem-solving skills in a simulated consulting environment. Specifically, it assesses the following key areas:

Structured Thinking: The ability to break down complex problems into smaller, manageable components and develop a clear, logical approach to solving them.
Data Analysis: The capacity to quickly and accurately interpret data from various sources, such as charts, graphs, and tables, and draw meaningful insights from them.
Business Acumen: An understanding of key business concepts and the ability to apply them to real-world situations.
Creativity: The ability to generate innovative solutions and think outside the box when faced with challenging problems.
Time Management: The ability to efficiently manage time and prioritize tasks to complete the case within the given timeframe.
Adaptability: The flexibility to adjust one’s approach in response to new information or changing circumstances.
Attention To Detail: The ability to carefully review and consider all relevant information when making decisions and recommendations.

How To Prepare For the BCG Online Case

Refining your problem-solving skills is essential for achieving success in the BCG Online Case experience. One of the most effective ways to develop these skills is by practicing mock case interviews. Engaging in these practice sessions helps you hone your ability to structure complex problems and devise logical solutions.

Every case interview includes structuring questions, which are critical to demonstrating your analytical prowess. For example, at the beginning of a case, you might be asked to develop an issue tree to break down the problem into manageable components. Throughout the case, you may encounter brainstorming questions such as, “Which factors influence market growth?” These questions test your ability to think strategically and comprehensively.

Practicing case interviews can be done independently, with friends, or with the guidance of an expert. Each method offers unique benefits:

Independent Practice: Allows you to work at your own pace and focus on specific areas where you need improvement.
Practicing with Friends: Provides the opportunity to simulate a more realistic interview environment and receive feedback from peers.
Expert Guidance: Offers professional insights and tailored advice to help you refine your approach and address any weaknesses.

By diligently refining your problem-solving skills through structured practice, you can significantly improve your chances of success in the BCG Online Case experience.

Type of BCG Online Case Interview Questions

1. Structuring/Information Questions

These questions present a scenario or problem and ask candidates to identify the most helpful option or the type of information that should be gathered. While they may appear data-focused, they require candidates to employ structuring techniques and create an issue tree.

Every BCG online case starts with a structuring or information question, such as:

Which of the following would be most helpful?
What statistics about ABC should the team gather?
Which piece of information would help ECG move forward with the project?

To approach these questions, carefully read the provided options and mentally construct an issue tree based on the available choices. Select options that collectively cover the issue tree and address the various components of the problem, demonstrating critical thinking, analysis, and the ability to identify relevant information.

2. Quantitative Questions

Each case typically includes approximately two quantitative/mathematical questions, usually presented in a short text answer format or occasionally as single-select multiple-choice questions.

Most quantitative questions are accompanied by an exhibit with around 20 data points, some of which may be extraneous. Knowledge of accounting or finance is not necessary, as the calculations and formulas are generally straightforward, involving concepts such as weighted averages, probabilities, and compound percentages. Practicing these types of problems can enhance performance.

The follow-up question can indicate whether your answer is correct. If asked to elaborate on your reasoning, your response is likely correct. If prompted to address specific calculations or smaller steps, your initial attempt may have been incorrect.

3. Critical Thinking & Logical Questions

These questions assess your ability to analyze a scenario, apply logical reasoning, and make informed judgments. They often involve evaluating different courses of action, determining cause-and-effect relationships, or identifying the most logical conclusion based on the provided information.

Pay attention to the wording and any qualifiers that indicate how airtight the logic needs to be. For example, “Which of the following courses of action would LIKELY MAKE you more rich?” has a weaker qualifier than “Which of the following courses of action would CERTAINLY MAKE you more rich?”

Consider relevant factors, constraints, or specific conditions mentioned in the question when evaluating the options.

4. Intuition/Insight Questions

These questions are highly popular but challenging to master. They require you to generate or select a range of insights, elements, or factors based on a given context. The specific insights can vary significantly, encompassing root causes, effects, solutions, and more.

Examples of intuition or insights questions include:

What are some personal expenses that tend to increase after getting married?
How can one become more disciplined in saving money?
What are effective talking points to persuade a life partner to reduce spending on clothing?
What are potential reasons for the underperformance of the stock market in the past six months?
In what situations would one need to utilize an emergency fund?

These questions demand thoughtful analysis and the ability to derive meaningful conclusions based on given scenarios. Diligent practice is essential to improve in this area.

Scoring Criteria

In the BCG online case chatbot, the selection of candidates is not solely based on the accuracy of their answers but also on their approach to problem-solving and their ability to break down complex issues. Candidates are required to provide an answer for each question to progress to the next one, leaving no choice but to make an educated guess even when unsure of the correct response.

While BCG does not disclose official information regarding the evaluation criteria, insights can be gathered from the BCG Interactive Case Library. The majority of criteria focus on the problem-solving aspect of the consulting role:

Problem-Structuring
Candidates are evaluated based on their problem-structuring skills, which involve approaching problems in a structured and mutually exclusive, collectively exhaustive (MECE) manner. The test also assesses the candidate’s ability to gather data and test hypotheses during the problem-solving process. Demonstrating strong analytical and problem-solving capabilities is crucial for management consultants.
Qualitative and Quantitative Processing
The BCG chatbot Test evaluates candidates’ math and analytical skills, specifically their ability to analyze and process both qualitative and quantitative information within the case. The test assesses their proficiency in performing relevant mathematical calculations, with an emphasis on common business-world calculations such as percentages, averages, and working with large numbers. The objective is to determine how effectively candidates can apply these processing skills to the given scenarios and derive meaningful insights.

Business Intuition
Candidates’ business intuition is another trait assessed in the BCG Online case. The test focuses on their capacity to evaluate potential costs and benefits, make informed decisions, and provide sound conclusions and recommendations based on their business knowledge and experience. The goal is to determine how well candidates can apply their business intuition to complex scenarios and provide relevant insights and directions tailored to the specific business context presented in the case.

Data Synthesis & Interpretation: Lastly, the BCG chatbot interview assesses candidates’ aptitudes for data synthesis and interpretation. This involves their proficiency in summarizing and synthesizing all relevant information to derive viable solutions for the client. The test measures their ability to draw meaningful conclusions from data, adopting a hypothesis-driven mindset. Candidates are expected to either incorporate their conclusions into existing hypotheses or generate new hypotheses that are relevant to the case at hand. The objective is to assess candidates’ ability to analyze and interpret data effectively to make informed decisions and provide valuable insights to the client.

The post How to Pass the BCG Online Case first appeared on Caseinterview.

With Gratitude

Victor Cheng — Wed, 22 Nov 2023 04:50:06 +0000

Today is a holiday in the United States called Thanksgiving. While there are multiple historical and contemporary ways people recognize this day, I see it as a time to be grateful and express gratitude for my life.

I am grateful for many things, including my family, friends, co-workers, and all of you.

I’ve had a pretty amazing life. While I have many roles in life, the one that is foundational for me is my role as a father to my three daughters.

My journey as a father parallels my journey as an instructor and mentor to aspiring management consultants. I got the idea for CaseInterview.com the same year my oldest child was born. (She’s now 20 years old!)

More than anything, I wanted to work from home to raise my kids. You have played an instrumental role in making that possible for me.

You see, CaseInterview.com started as a whim. I always wanted to teach the case interview and finally decided I would teach it, record it, and get it out of my system. I never thought in a million years that I would reach one million website visitors a year. I never thought my book Case Interview Secrets would sell over 100,000 copies (putting it in the top 0.4% of all books sold).

I have probably spent less than $1,000 on marketing over the last 15 years. The reason you are reading this email today is likely because either someone told you about me or you found me via Google or YouTube (largely because of someone else who managed a website linked to CaseInterview.com).

It’s because of you and your word of mouth that CaseInterview.com has thrived over the years. What started as a passion project ended up becoming a side business for me. It has allowed me to take on fewer corporate clients (that sometimes involve travel). It has allowed me to “speak” to a global audience without having to leave my home.

To this day, I still run into people who tell me that my work helped them with their case interviews early in their careers – 7, 10, or 13 years ago. It’s really quite amazing to me.

I wanted to thank you for two things:

1. Thank you for investing your time into reading what I write. You are busy. My goal has always been to add value and never waste someone’s time. Even though I give away 95% of what I do online, it is not “free,” as you must devote one of your precious resources to read it – your time. So thank you for that.

2. Thank you for telling others about CaseInterview.com. It is astounding to me that people from 200 countries and territories read and watch my work. The United Nations only recognizes 193 countries! I never imagined that I could have some global reach without ever having to be on an airplane. This is pretty common today, but 20 years ago it was considered wild fantasy. But… for me, it became my reality because of you.

On this day, I want to express my gratitude to you and your family. I wish you the best going forward.

Gratefully Yours,
– Victor

How to Live an Amazing Life – Sign Up for Free Tips and Strategies for your Career and Life.

This form collects your name and email so that we can add you to our email list that delivers the free resources you are requesting. Check out our privacy policy for details on how we protect and manager your submitted data.

We’ll never spam you or share your email. Unsubscribe at any time.

The post With Gratitude first appeared on Caseinterview.

THE Essential Skill to Getting Promoted

Victor Cheng — Wed, 02 Aug 2023 23:00:00 +0000

Once you’ve been an individual contributor, often the only way to progress further in your career is to manage people.

The only way to get promoted beyond a small management role is to be extremely effective at delivering results through other people’s labor and efforts.

Everyone wants the promotion and raise, but few people want to actually become good at managing people. The latter enables the former.

The best salesperson does not in and of itself make the best Director of Sales.

The best engineer does not in and of itself make the best Vice President of Engineering.

The best marketer does not in and of itself make the best Chief Marketing Officer.

That’s because the act of managing people in a functional area is different from being good at a particular functional skill yourself.

Generating a bunch of sales yourself is very different from getting 12 people to all generate remarkable sales.

The same is true in product management, supply chain, and operations.

The demand for people-management skills goes up even more for cross-functional teams or when working with peers where you do not have reporting authority over the other people on the team.

To learn more about how to manage people effectively, consider joining my upcoming class on How to Manage People Effectively. To be notified about its release, complete the form below.

Yes, Please Notify Me of the Release of How to Manage People Effectively

This form collects your name and email so that we can add you to our interest list for Class on How to Manage People. Check out our privacy policy for details on how we protect and manage your submitted data.

We’ll never spam you or share your email. Unsubscribe at any time.

The post THE Essential Skill to Getting Promoted first appeared on Caseinterview.

How to Motivate Others

Victor Cheng — Sat, 15 Jul 2023 11:01:59 +0000

When you’re managing a team, one of the big challenges is learning how to motivate the people you manage.

While not everyone can be motivated, many can… if you know what to do and what not to do.

One aspect of motivating managers is being extremely effective as a manager and leader. Have you ever worked for a terrible boss? If you have, you know how demotivating it is to work for someone that’s unclear, arbitrary, doesn’t communicate, lacks people skills, doesn’t have a plan, and can’t lead.

The flip side is true. If you’re good at managing people, you make it easy, and even enjoyable, for your direct reports to be successful and do a good job. Very few people inherently want to do a bad job. Nobody intentionally wants to join a losing team. Everyone wants to win. It is your job as a leader to create a winning team environment.

Motivating and managing other people is its own skill, separate from being a competent engineer, marketer, customer service team member, or supply chain expert. Being good at a functional skill does not automatically give you the skills to manage people. It’s a distinctly different skill that must be learned somehow.

Here’s one tip for how to manage others. Be clear in terms of what you want and what you expect.

When my kids were younger, they loved archery — using a bow and arrow to hit a target. Archery is a very simple (but not easy) sport. There is a target made up of multiple circles of different sizes. The goal is to hit the target in the dead center or “bullseye.”

It takes young children all of two minutes to learn the objective of the sport. It is very clear what you’re supposed to accomplish: hit the target in the smallest innermost circle.

Very simple.

Now hitting that target isn’t always easy… but at least you know what you’re striving for.

In many jobs, people don’t always know what you want them to do. That’s a problem. That’s demotivating. That demonstrates poor people management skills. Don’t make this mistake.

To learn more about how to motivate and manage other people effectively, you might consider my upcoming class on How to Manage People Effectively. To be notified about its release, complete the form below.

Yes, Please Notify Me of the Release of How to Manage People Effectively

We’ll never spam you or share your email. Unsubscribe at any time.

The post How to Motivate Others first appeared on Caseinterview.

How to Become a VP or C-Level Executive

Victor Cheng — Mon, 10 Jul 2023 19:13:16 +0000

The key to getting (and keeping) a VP or C-Level job is to demonstrate the required leadership and people management skills before and after you get the job.

You need to demonstrate these skills before you get the job in order to get the promotion. You need to demonstrate these skills after you get the job in order to keep it.

But how do you get good at skills you’ve not necessarily been formally taught?

How does a good salesperson learn how to be a good sales manager and leader?

When does an exceptional engineer learn about managing other engineers?

The reality is that in 90% of companies, you’re never formally taught or get a chance to learn these skills.

Doing the work and managing the people doing the work are two completely different skills.

Skills don’t magically fall from the sky. They have to be acquired in some way, shape, or form.

The only ways to learn the skill of managing people are to:

1) Have a role model or mentor that you emulate (e.g., My bosses at McKinsey and in industry were fabulous people leaders and I learned a lot by watching them over many years.);

2) Be taught the skill.

For example, if you’ve never seen anybody ride a bicycle before, it’s nearly impossible to learn. If you see an older sibling, other kids at school, or your neighbors riding a bicycle, you can try to copy them.

Yes, you’ll fall and stumble a bunch of times, but you can eventually figure it out if you try enough times and are willing to tolerate the stumbling.

The other way is to have someone teach you the skill you want to acquire. Teaching involves taking a skill and breaking it down into its component parts. It’s teaching each part one at a time, allowing you to practice each part in isolation before putting them all together.

[I’ve taught six people to ride a bicycle (each time in under an hour). Five were children (including my three daughters) and one was a friend (aged 45 that had never been taught).]

After a ton of requests, I’ve decided to teach a class on How to Manage People Effectively. Over the last decade, so many of you have successfully advanced in your career.

In a recent survey, I was surprised at how many people some of you are managing. I think that’s wonderful.

Upon further reflection, I’m a bit shocked that so far, I’ve never actually taught a class on How to Manage People Effectively. It’s long overdue.

It’s the most commonly asked request for help that I receive in my inbox. It’s the issue my clients’ teams struggle with the most (they promote successful individual contributors only to see them struggle and fail as managers).

If you currently manage people or plan to do so in the future, it is critical to learn this skill. To receive my articles on How to Manage People and to be notified about my upcoming class, just complete the form below.

Yes, Please Notify Me of the Release of How to Manage People Effectively

We’ll never spam you or share your email. Unsubscribe at any time.

The post How to Become a VP or C-Level Executive first appeared on Caseinterview.

MECE Framework / Principle – What does it mean? Why do consultants find it useful?

Victor Cheng — Sat, 27 May 2023 04:52:42 +0000

MECE = Mutually Exclusive Collectively Exhaustive

MECE stands for Mutually Exclusive Collectively Exhaustive. The MECE Principle is a framework used by management consulting firms to group data into categories that following a two specific rules. This categorization makes it easier to analyze and derive useful conclusions. The two data categorization rules of MECE are: Mutually Exclusive – An item or data record can only be in one category at a time and Collectively Exhaustive – All items or data records must be included in one category (e.g., your categorization structure can not exclude an item or data record)

To put it in “plain English,” a data set (such as customer data) is categorized in a MECE way when a record only appears in one category and all categories combined include all records of the data set.

The “Mutually Exclusive” part represents the idea that a single record can not appear in two categories (e.g., your height can’t be greater than 150 cm and less than 150 cm at the same time).

The “Collectively Exhaustive” means the categories used is completely exhaustive — meaning you didn’t forget a category (e.g., your height categorization structure includes both the shortest and the tallest person in the data set). MECE is much easier to understand via an example.

MECE Segmentation and Planning

MECE segmentation can be applied to any type of business or personal concern. It has clear practical advantages that help you to think analytically about the problem at hand.

Some examples of mutually exclusive collectively exhaustive segmentation include grouping customers by:

Defined age brackets where there is no category overlap
Country of Birth, assuming no geographical overlap
Highest level of education obtained
Defined revenue brackets
Number of employee brackets

MECE Segmentation Example: Age Brackets

You might have a customer list segmented according to the following age brackets:

Age 0-15
Age 16-30
Age 31-45
Age 46-60
Age 61-75
Age 76+

With these categories, you have covered all possible ages of customers, and no individual can appear in more than one category, no matter when the analysis is performed. Notice that about 15 years are represented in each category, making them easily comparable.

Depending on the specific characteristics of your customers, you may be able to use a smaller number of categories that cover a broader range of ages. Some management consultants prefer this approach since it’s easier to manage fewer categories. But, having more categories helps ensure that the underlying similarities between the categories are clear.

Choosing Exhaustive Categories for MECE Segmentation

Consultants planning to use the MECE principle to their advantage must think through the categories carefully and challenge their initial response. Until you have practice with MECE thinking, it is common for the first categories you develop to need reworking.

Making the MECE Principle Work in Practice

There are some best practices that can make MECE easier to use. It’s important to understand each of these points before using MECE in your case interview with McKinsey or other top consulting firms.

There are five principles:

The Small Elements of a Set Cannot Overlap

If items appear in multiple categories, the framework will not work correctly. Take time to think of any atypical situations that may put a person in more than one category.

In the age bracket example, it would be easy to accidentally create a non-MECE framework with just one year of overlap in your age brackets. In many situations, an overlap is caused by a simple typing error or oversight, so always double-check your materials.

The Sum of Parts Must Equal the Whole Group

For a framework to be collectively exhaustive, it must represent the whole group. This may require you to consider a typical customer use cases. For example, a restaurant might have walk-in, online, and drive-through customers. They may also have customers who order through third-party apps like Uber Eats or Door Dash. These customers must also be represented.

Small Elements Must Parallel One Another

Categories in MECE classification should be directly comparable whenever possible. You would not want to compare the customers in the Boston metropolitan area with those in the whole state of Wyoming, even if the number of customers in each category is approximately the same.

You Should Always Leverage the Magic of Three

The “Rule of Three” describes the fact that sets of three items tend to be memorable and intuitive. Although this is not an absolute requirement of MECE, it is easiest for people to remember sets containing four items or fewer. This will make the framework easier to understand.

Look Out for Logical Errors and Inconsistencies

MECE is a potent tool, but it is not the only tool. It doesn’t protect you from all possible oversights or fallacies that you might come across. Always examine your assumptions closely, even if your MECE framework feels like it’s perfect.

The Shortcomings of Non-MECE Segmentation

Decision-makers in any job often make the mistake of using non-MECE grouping structures, particularly when thinking about their clients and customers. This leads to duplication of labor and makes it less likely that data collected will be relevant.

Non-MECE segmentation may seem intuitive at first. The data collected may be useful in other contexts, but it won’t solve your problem. If you get stuck on this data, it can lead to incorrect patterns of thinking that don’t address the strategic issues.

Some examples of non-MECE segmentation include listing customers according to:

Hobbies and interests
The colleges they graduated from

Non-MECE Example: Hobbies

Why do these examples fall short? Let’s use the list of people separated by their hobbies as an example. A business might attempt to categorize their customers as involved in indoor hobbies or outdoor hobbies. Initially, this seems to have some logic to it. Looking closer, however, it also has clear drawbacks:

It is not mutually exclusive since individuals may be involved in both types of hobbies.
It is not collectively exhaustive since it does not address those not involved in hobbies.

MECE in Management Consulting Example:

The MECE principle is a foundational part of thinking through problems at management consulting firms. As a candidate, you will hear about it consistently throughout the recruiting process and will have to apply it in many scenarios. Luckily, these scenarios tend to mimic real-life situations closely.

During case interviews, you’ll often find yourself facing situations where you have very little data to act on. In these moments, recruiters are testing the limits of your ability to understand the situation and work through it in a fast-paced, uncertain environment– just as you will with your future clients.

The Profitability Framework

The most common example of MECE thinking-in-action is known as the profitability framework.

Using predefined frameworks in your case interviews can be problematic. They often fall short and fail to grasp the nuances of a real-world situation. However, the profitability framework is different. It is an efficient, precise approach utilized daily to decipher the root of a profitability problem. Revenues and costs are the key factors to be aware of.

Every step of the profitability framework is based on MECE thinking:

First, profits are broken down into revenues and costs.
Then, revenues are broken down into volume and price per unit (PPU).
Costs are broken down into fixed costs and variable costs.
Variable costs can be further broken down into volume and cost per unit.

This is the beginning of our issue tree. Each individual item is defined and kept separate from the rest. Then, operations can be performed on each, individually. In this case, the “operation” involves questioning items to try to find the source of the decline in profit.

The profitability framework, in particular, is helpful because it demonstrates how multiple data sets within your MECE analysis can be applied to a problem.

Within the profitability framework, looking at year over year volume and price per unit may help you determine if revenue declined over a certain period. While this is vital information, it doesn’t provide you with the complete picture. Costs could have increased over the same period of time, adding factors that you need to take into account.

MECE allows you to perform multiple analyses while keeping each analysis separate. This prevents mistakes that might be caused by incorrectly assuming there is a relationship where there isn’t one. In the end, you will have a full understanding of each individual piece of the problem. These all come together to form a bigger picture that will help you reach your conclusion.

How to Use MECE in a Case Interview

Case interviews are typically structured around a hypothetical problem that the interviewer will ask you how to solve. Frameworks are a good place to start in these situations but may not always apply.

Sometimes I start with a business situation framework, but then have to switch to a supply/demand framework. Other times, I’ll start with a standard framework, and then have to make up a new one on the fly.

In these situations, remember that your priority is to give a high-level answer that is organized in a way that is easy to follow way. If you panic and just start listing off half-developed ideas with no follow-up information, your interviewer will get lost.

This is where the MECE principle comes into play. MECE will help you focus on major categories and develop ideas from the top down. It essentially will give the interviewer an overview of your potential solutions.

Let’s say that the interviewer asks you, “How can this company grow?”

Here are some possible ways to organize your answer to that question:

Products/Services – Existing vs. New
Customers – Existing vs. New
Distribution Channels – Existing vs. New

From here, you can narrow down your ideas based on the interviewer’s follow-up questions/information. There may still be overlap in these primary areas, but sometimes you won’t be able to get around it.

You may find that your interviewer is speaking in vague terms or unwilling to help you unpack a question. This could be because the interviewer doesn’t want to give away the answers they are looking for by giving examples. Restructure the question you ask or confirm that you understand correctly before attempting to answer the question.

Also, the interviewer may not have the expertise in some areas to answer your questions or give you more information.

While consultants like to have a clean MECE framework, sometimes being MECE-enough is all you can come up with on the spot. All you can do is narrow it down as far as possible. Before you resign to the MECE-enough approach, make sure you’ve explored all your other options.

In terms of practicing your MECE skills, use the framework in everyday life as much as possible. It may sound absurd for everyday life, but it will help you think like a consultant.

Maybe your spouse asks you “Where should we go to dinner tonight?”

You break down your options like this:

Restaurants you both have been to
Restaurants one of you have been to
Restaurants none of you have been to

You may not want to use this approach out loud in a social setting — just think that way in your head. Eventually, it will become second nature to solve problems this way.

Conclusion

The Mutually Exclusive Collectively Exhaustive (MECE) principle will make you a better decision-maker and problem-solver. It helps you see the situation more clearly and reach conclusions that are really going to help your business. Do you see how the next time you are faced with a complex issue, using the MECE framework will assist you with working out the possible causes and lead you to the best solution? How would you use the mutually exclusive collectively exhaustive principle to solve a business or personal problem you are currently faced with?

The post MECE Framework / Principle – What does it mean? Why do consultants find it useful? first appeared on Caseinterview.

Big 4 Consulting vs. MBB

victor — Sat, 27 May 2023 04:18:26 +0000

Working in the consulting division of a Big 4 Accounting firm differs from working at one of the MBB (McKinsey, Bain, or Boston Consulting Group) firms. This article summarizes the key differences in work and lifestyle.

Strategy vs. Implementation

The MBB consulting firms focus on doing strategy work while the consultants at the Big 4 do a lot more implementation. Strategy consulting projects include advising clients on entering new markets (geographies, new product categories, new customer segments), developing new distribution channels (selling via a salesforce, via resellers, via e-commerce), and entering new product categories.

Strategy projects tend to be higher-stakes decisions that often get visibility at the highest levels of a company and to the Board of Directors. Strategy focuses on “what” we should do and “when” we should do it.

Implementation projects focus more on the “how.” After a company decides to enter a new geographic market, there’s a lot of work to be done to make that happen. There are people to be hired, staff to be trained, and technologies to be modified to support the new strategic decision.

Seniority Level of Client

The typical client for an MBB firm would be the CEO of the company or the President of a division of a large Global 500 company. The typical client for the consulting division of a Big 4 Accounting firm would be a senior executive in a particular functional area such as Supply Chain, Human Resources, or Technology.

The partner at a consulting firm is the primary contact with the “client” (I’m referring to the client in this context as a human being as opposed to a corporate entity). As a consultant, you would be working with junior clients that are typically one to three levels “lower” in the corporate hierarchy than the person with whom the partner interacts.

Client Interaction

This has several implications as to which individuals within a client organization you’ll be working with. At an MBB, the partner will be working with the CEO, and you would likely be working with the Vice President of a functional area day-to-day with occasional presentations to the CEO.

At a Big 4 firm, you’ll be working with Managers and Directors of various functional areas within the client organization. You’ll occasionally be involved with presentations that are seen by the Vice President of a functional area.

Breadth vs. Depth of Experience

As a result of the differing seniority levels of the client, the breadth and depth of the business problems you’ll gain exposure to will vary between the two types of firms. At MBB, because “the” client is the CEO, you will be forced to work on the cross-functional issues that the CEO is concerned about. At a Big 4, your client runs a functional area so you’ll be working more on issues within a single functional area.

At MBB, you’ll experience far more breadth and cross-functional perspective. At a Big 4, you’re going to get much more depth in a functional area because of the concerns of the client contact.

Degree of Supervision

At a Big 4, your work will be tightly supervised with your manager being involved in the deliverables that you work. At MBB, in the first 6 to 12 months (depending on your experience level), your manager will be tightly supervising your work. However, the goal at an MBB is for you to be able to work more independently.

Much of the work at MBB is more customized (as opposed to template oriented) and requires a lot of problem-solving and “figuring things out” as opposed to following a predefined project protocol that has been done several dozen times previously.

Hours Worked

Another major difference between working at a Big 4 vs. working at an MBB will be the hours worked. You’ll be working much longer hours at an MBB than a Big 4 – typically 10 to 25 hours a week more. This will be more in the 10 to 15 hours-a-week range in a city with a less intense work culture (like Denver), as opposed to 15 to 25 hours a week more in a city with a more intense work culture (like New York City).

When Is a Big 4 vs. MBB the Better Fit?

Big 4 is a better fit for you if you want a much better work-life balance and if you know you want to work in a specific functional area at the execution/implementation level. MBB is a better fit if you don’t mind the longer hours, want to work with more senior-level clients, and want to work on projects that are more strategic and cross-functional in nature.

The post Big 4 Consulting vs. MBB first appeared on Caseinterview.