@constantinsasarman: Your BCG interviewer asks: should 40 dental clinics start offering clear aligners? Almost everyone builds a structure full of questions like: what’s the market size? What are the costs? Who are the competitors? That’s the mistake. There’s nothing wrong with those topics. The problem is how they’re asked. “What’s the market size” has no finish line. You could research it forever. We call the fix being hypothesis-driven, and it means two things: 1. Every question at the bottom of your structure can be answered with a yes or a no 2. You offer your best guess on where the case is going, with a reason behind it So “what’s the market size” becomes: do enough of our current patients want straighter teeth to fill an aligner program? Say the objective is for aligners to pay back the investment within two years. Two buckets: 1. Is there enough demand for aligners among our patients? Existing patients (do enough of them already ask our dentists about straightening their teeth, and would they choose us over the lower-cost mail-order kits?) and new patients (would aligners bring in people who then stay with us for cleanings and checkups?) 2. What is the profitability and investment cost of offering them? The revenue per case, and the costs: training our dentists, scanning equipment, and lab fees per case My hypothesis: existing patients are the key, because our clinics already see them twice a year, so we’d barely need to spend on marketing to reach them. Every question at the bottom ends in a yes or a no. That’s what makes it something you can actually solve. If you’ve been working for a few years, you’ve probably learned not to guess before you have the data. That’s a good instinct at work. In a case, a guess with a reason behind it is how you show judgment. You’re not committing to it, you’re telling them where you’d look first. I’ve coached more than 100 people on breaking into consulting, and this is one of the most common gaps I see, even in people who are really strong analytically. Any questions? Let me know in the comments and I’ll be happy to help. #consulting #bcg #caseinterview #consultingcareers #caseinterview

Constantin Sasarman

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Sunday 18 October 2026 19:59:13 GMT