Interviewer-Led vs Candidate-Led Cases
Interviewer-led cases (McKinsey) guide you through a series of questions; candidate-led cases (BCG, Bain) require you to drive the entire analysis yourself. The same problem-solving skills apply, but the pacing and communication style differ significantly.
Quick Comparison
| Aspect | Interviewer-Led | Candidate-Led |
|---|---|---|
| Primary Firm | McKinsey | BCG, Bain |
| Who Drives | Interviewer sets the agenda | Candidate sets the agenda |
| Structure | Pre-defined questions in sequence | Open-ended, you choose what to explore |
| Framework | Less emphasis on upfront framework | Must present framework at start |
| Data | Given exhibits per question | Request data as needed |
| Key Skill | Answering precisely what's asked | Knowing what questions to ask |
Interviewer-Led (McKinsey Style)
How It Works
The interviewer controls the flow. They'll ask specific questions like "What factors would you consider?" or "Look at this exhibit—what do you notice?" You respond, then they move to the next question.
Typical Flow
- 1. Case prompt (2-3 sentences)
- 2. Clarifying questions (1-2 minutes)
- 3. Series of 4-6 directed questions with exhibits
- 4. Synthesis request at the end
Success Tips
- • Answer the exact question asked—don't go on tangents
- • Take 15-30 seconds to structure your answer before speaking
- • Use MECE structure even for individual answers
- • Track insights from each question for your final synthesis
Candidate-Led (BCG/Bain Style)
How It Works
After the case prompt, you're in the driver's seat. Present your framework, then systematically work through it. The interviewer responds to your questions and may redirect if needed, but you control the pace.
Typical Flow
- 1. Case prompt (1-2 paragraphs)
- 2. Clarifying questions (1-2 minutes)
- 3. Present your framework (2-3 minutes)
- 4. You drive through each branch, requesting data
- 5. Synthesis when you've gathered enough evidence
Success Tips
- • Your framework must be MECE and tailored to the problem
- • Signpost constantly: "I'd like to start with revenue…"
- • Summarize insights before moving to the next area
- • Know when to cut analysis short and move on
Firm-by-Firm Guide
| Firm | Primary Style | Notes |
|---|---|---|
| McKinsey | Interviewer-led | Very structured; exhibits per question |
| BCG | Candidate-led | Framework critical; some offices more guided |
| Bain | Candidate-led | More conversational; expects business intuition |
| Deloitte | Hybrid | Varies by practice; often more guided |
| Strategy& | Candidate-led | Similar to BCG; emphasis on creativity |
Frequently Asked Questions
Can I use the same preparation for both styles?
Mostly yes. Core skills (structuring, math, synthesis) are identical. The main difference is practicing framework presentation for candidate-led cases and exhibit interpretation for interviewer-led ones.
Which style is harder?
It depends on your strengths. Candidate-led is harder if you struggle with ambiguity or driving conversations. Interviewer-led is harder if you tend to over-explain or miss the specific question asked.
What if the interviewer switches styles mid-case?
Follow their lead. If they start asking specific questions in a candidate-led case, answer directly instead of trying to redirect. Interviewers sometimes guide struggling candidates—take the help.
Related Terms
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