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Case Prep: a) Self-practice recommendations, b) structuring advice, and c) clarifying questions

a) Self-practice recommendations
1. I was wondering how I should go about hypothesis and structuring self practice when online casebook prompts and solutions do not share the metric by which to evaluate the problem in the “interviewer notes to share with candidates” section. 


2. Are there any casebooks you can share suitable for self practice with clarifying questions responses included? Usually online casebooks do not share responses to candidate's clarifying questions, such as the success metrics, etc before creating the hypothesis and custom structure / framework. 

b) Structuring advice
1. I find it hard to know how to structure framework with just qualitative factors and not success metrics? Any tips here? 

c) Clarifying questions
1. Should I aim to get specific numeric information within the Q/A clarifying questions portion like the market size or growth rate? I thought specific data questions like this should NOT be asked early on (only broader issue defining questions)?

2. Are these 6 questions a good template to ask during the Q/A clarifying portion even thought I understand not all information will be shared from each of these questions? I also understand these questions are more than the typical 2-3 questions as part of convention.

1. Motivation behind phenomenon
2. Time frame behind phenomenon or how long the business has been in operation
3. Business model of client / industry, with drivers of revenue streams and customer base types 
4. How to define success / metrics or any particular priorities?
5. What does "xyz" refer to / how will it be measured (ex. "growth")?
6. Any additional context you feel is relevant?


Thank you!

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Top answer
Evelina
Coach
on Mar 18, 2025
EY-Parthenon (6 years) l Ex BCG l 97% success rate l 30% off first session l free 15' intro call l LBS

Hi there,

a) Self-Practice Recommendations
    1.    How to practice hypothesis-driven structuring when casebooks lack key metrics:
    •    Reverse-engineer metrics: When practicing with casebooks that don’t specify success metrics, try to infer what the key metric would be based on the case objective. For example, if the case is about increasing profitability, likely metrics include revenue growth, margin expansion, or cost reduction.
    •    Look at similar real-world cases: Review case interviews shared by consulting firms (Bain, McKinsey, BCG) where they disclose success metrics. This will help you develop an intuition for what to ask.
    2.    Casebooks with clarifying question responses included:
Most online casebooks do not provide responses to candidate clarifying questions, but a few good resources include:
    •    Case Interviews Cracked (by Victor Cheng) – Includes responses to common questions.
    •    LBS, INSEAD, or Harvard Case Books (often found in consulting prep forums) – Some provide partial responses to clarifying questions.
    •    Consulting Clubs’ Case Books (Wharton, Kellogg, MIT Sloan, etc.) – You may need to check multiple books, but some offer guidance on clarifying question responses.
    •    PrepLounge & CaseCoach – These platforms sometimes offer interactive examples where clarifying questions are addressed.
 

b) Structuring Advice
    1.    How to structure a framework without predefined success metrics:
    •    Start broad, then narrow down: If metrics aren’t provided, think in terms of “What are all the possible ways this business could define success?” List multiple metrics and then refine them as you gather information.
    •    Build a metric-agnostic structure: Instead of relying on numerical success metrics, structure your framework using broad categories:
    •    Financial: Revenue, costs, profitability, investment needs
    •    Market Dynamics: Competition, market trends, customer segments
    •    Operational: Supply chain, scalability, efficiency
    •    Risks and Constraints: Regulatory issues, strategic risks, feasibility
    •    Use multiple layers: If you lack numerical data, add qualitative factors (e.g., brand perception, competitive positioning, customer loyalty) to balance your structure.
    •    Use scenario analysis: Without precise numbers, break down potential outcomes into high, medium, and low-impact scenarios to guide your thinking.

c) Clarifying Questions
    1.    Should you ask for specific numeric information (market size, growth rate) in the Q&A phase?
    •    Yes, but only if it’s fundamental to structuring. Asking for market size, growth rate, or margins can be appropriate if the case context suggests these will be key drivers of the problem.
    •    Avoid overly detailed number requests early on. Instead, ask about trends or general ballpark figures (e.g., “Has market size been growing, and at what approximate rate?” rather than “What is the exact market size in dollars?”).
    •    Ask broader questions first, then narrow down:
    •    Example: “Is this company a market leader, or is it a niche player?” → If it’s a market leader, then a detailed growth rate may be relevant; if it’s niche, a customer segmentation breakdown may be more useful.
    2.    Are these six clarifying questions a good template?
Yes, these are great clarifying questions that provide strong foundational context. However, consider adjusting them based on the case. Here’s a refined version with slight modifications for efficiency:
    1.    What is the motivation behind this problem? (Understanding the underlying issue and why it matters.)
    2.    What is the time frame we should consider? (Recent trends vs. long-term impact.)
    3.    Can you describe the client’s business model, key revenue drivers, and customer segments? (Helps structure financial and market analysis.)
    4.    How is success defined for this case? Are there any specific priorities or constraints? (Ensures alignment on key objectives.)
    5.    Can you clarify what “X” means in this case? For example, what does “growth” refer to—revenue, users, or market expansion? (Avoids misinterpretation.)
    6.    Is there any additional context or external factors we should consider? (Allows the interviewer to highlight critical missing information.)

Final Thought: While asking 5-6 questions is more than the conventional 2-3, if phrased concisely and logically, they won’t seem excessive. Make sure to prioritize based on the case, ensuring you get the most critical information early.

Suggestion: Since most casebooks don’t explicitly state responses to clarifying questions, practice with a partner who role-plays an interviewer, a real interviewer - they are the best source to confirm if your clarifying questions and structure are on point - feel free to reach out, happy to help!

Best,
Evelina

Anonymous A
on Mar 20, 2025
Thank you! Your response helps a lot. Any recommendations on the best practices for when we receive data (i.e. charts, graphs, tables, etc)? - Logistics? 1. what to say when receiving it 2. how long to pause and what to do / study during pause 3. what to say after pause? - Insights? 1. what trends/insights to share with interviewer and how long should it take? 2. how long to keep on discussing patterns on the data? - Calculations? 1. Should the interviewer prompt us to make a calculation on the graph, or should we the candidates be the one to say we would like to calculate "xyx" given this data? - Connecting it back to case / hypothesis / etc? 1. How should we go ahead and connect our chart insights back to the case and share a "so what"? 2. Should we try to do this "so-what" step pre-calculation or post-calculation, or during both times, and 3. what should we say to effectively make a true link / share the "so what" aspect?
Florian
Coach
on Mar 20, 2025
1400 5-star reviews across platforms | 600+ offers | Highest-rated case book on Amazon | Uni lecturer in US, Asia, EU

Hi there,

Feel free to reach out and I can share a couple of practice case books.

Cheers,

Florian

Alessa
Coach
2 hrs ago
xMcKinsey & Company | xBCG | +200 individual & group coachings | feel free to schedule a 15 min intro call for free

Hey there 😊,

You’re asking exactly the right questions—this level of intentional prep will really set you apart. Let me break it down in a focused and practical way for each part:

a) Self-Practice Recommendations

1. No success metric provided?
→ Create your own! You can say:

“In the absence of a stated goal, I’ll assume success means increasing profitability / revenue / market share—unless clarified later.”

This helps you practice structured assumptions, which is expected in real cases.

2. Casebooks with clarifying Q&A included?
Most public casebooks don’t include that level of detail. I recommend:
– Practicing with a partner and taking turns improvising answers to clarifying questions
– Or, message me—I can send you case prompts where we simulate the back-and-forth Q&A more realistically 😊

b) Structuring Without Metrics

If no metrics are given, anchor your structure around:
Customer, product, revenue, cost (business model-focused)
– Add a “success factors” box where you define the potential metrics (e.g., profit, NPS, retention)
This shows clarity even with ambiguity, which is a win.

c) Clarifying Questions

1. Should I ask for numbers like market size early?
Not yet. Stick to qualitative framing questions first, like:
– “How does the client define success?”
– “Is there a particular market or segment in focus?”
Only ask for data after you’ve set your structure.

2. Your 6-question template?
Love it—it’s thorough and shows curiosity. But in interviews, keep it to 2–3 smart, high-impact questions max to stay sharp.

My suggestion:
✅ Ask about objective (success metric)
✅ Clarify context (timeline, product, market)
✅ Confirm if there’s any constraint or key priority

Let me know if you'd like to simulate this with real-time feedback—I’d be happy to support you with live practice 😊

Best,
Alessa 😇

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