OC&C Commercial Due Diligence Cases: The Firm's Signature Case Type
The OC&C commercial due diligence case is the firm's signature interview format: you act as a consultant advising a private equity investor on whether a target company is worth buying. Market attractiveness, competitive position, growth outlook — the occ commercial due diligence case compresses real CDD work into a 30-to-45-minute interview. If you cannot do this case type, you cannot get an OC&C offer.
What an occ commercial due diligence case Is
Commercial due diligence is the core of OC&C's business. In private equity deals, before a fund spends hundreds of millions acquiring a company, it hires OC&C to answer one question: is this a good business in a good market? In the interview version, you get a target company and a market, some data exhibits, and you must assess market size and growth, competitive dynamics, and the target's positioning — then give a buy / don't buy recommendation with reasoning.
What the occ commercial due diligence case Tests
The occ commercial due diligence case tests whether you think like an investor. Interviewers watch for commercial instinct: do you instinctively ask about market growth, customer concentration, pricing power, and defensibility? They test structured analysis of ambiguous data, fast mental math on market sizing and margins, and the courage to take a view — a hedged non-answer is the classic fail. Because this mirrors the firm's actual day-to-day work, performing well here signals you can do the job from week one.
How to Prepare for the occ commercial due diligence case
Learn the CDD anatomy cold: market (size, growth, segments), competition (share, positioning, barriers), customer (concentration, switching, pricing power), and the target (margins, growth vs. market, risks). Practice sizing markets out loud under time pressure — CDD cases almost always open with a sizing question. Read one PE deal story per week and ask yourself: would you buy this company, and why? Then force a one-sentence investment thesis. Drill taking a stance; interviewers can smell indecision instantly.
The fastest way to learn the pattern is seeing real OC&C-style material. Our 2027 OC&C Strategy Consultants Online Test Tutorials (One-Way Video Assessment and Mapped Test) covers OC&C's real assessment formats with exact questions and answers — the foundation you build CDD case reps on top of.
The occ commercial due diligence case Is the Whole Game
Understand this clearly: the occ commercial due diligence case is not one topic among many at OC&C — it is the firm's identity. Candidates who have never practiced a CDD case treat it like a generic profitability case, miss the investor lens entirely, and are out. The 2027 intake is already screening.
FAQ
What is a commercial due diligence case? A CDD case asks you to evaluate whether an investor should acquire a target company, covering market attractiveness, competitive position, growth, and risks before giving a buy/no-buy recommendation.
Why does OC&C focus on CDD cases? Commercial due diligence for private equity is OC&C's core business line, so the interview tests the exact work you would do as an Associate Consultant.
How long is an OC&C CDD case interview? Expect roughly 30 to 45 minutes of case discussion within the interview, with the final partner round running longer and harder.
Preparing for OC&C's commercial due diligence cases? Our 2027 OC&C Strategy Consultants Online Test Tutorials (One-Way Video Assessment and Mapped Test) has the exact questions and answers — $79 one-time, instant download.
