A blended "7 out of 10" after a practice case is almost useless. It does not tell you which five minutes of the interview leaked the points, and it does not tell you what to drill tomorrow. I built CoachNed's debrief the other way: seven separate scores, each with a short note and a quote from your own transcript, each mapped to a drill family you can run the same day.
That is the thesis. Firms never publish a public seven-row score sheet with those labels. They do publish the moves they care about. The seven dimensions — Structuring, Hypothesis, Math, Charts/exhibits, Synthesis, Communication, Business judgment — are my translation of those moves into something you can practice against after a live voice case.
After this piece you should be able to open a CoachNed debrief, ignore the vanity of any single number, and turn the weakest row into tomorrow's assignment.
Why seven, and why these seven
McKinsey's careers page frames the problem-solving interview as a client scenario used to evaluate analytical thinking and how you approach complex problems. Its public sample cases coach the same moves in the open: organize your thoughts before diving in, read charts for non-obvious trends, and talk the interviewer through calculations. That is not a secret rubric. It is a list of moves.
BCG's case-prep page is even more concrete. You structure an approach, ask thoughtful questions, analyze data, perform quick calculations, and identify the most important factors, while communicating clearly and showing business intuition and creativity. Bain's case page says they are not hunting for one right answer; they want how you think, structure problems, and build on ideas. Their interview tips stress clarifying the objective, structuring your thinking, thinking aloud, listening and adapting, and emphasizing key points.
Those public lists collapse into seven practice dimensions:
| Dimension | What it captures in the room | Closest firm language (public) |
|---|---|---|
| Structuring | Opening issue tree, MECE branches, prioritization | Structure the approach; break down the problem |
| Hypothesis | A testable claim before deep analysis | Ask thoughtful questions; drive toward insight |
| Math | Stated approach, clean calculation, business translation | Quick calculations; deal with facts and data |
| Charts/exhibits | Correct read of a table or chart, tied back to the ask | Analyze data; implications of facts |
| Synthesis | Recommendation a partner could brief upward | Conclusions and recommendations |
| Communication | Clarity, pacing, recovery under spoken pressure | Articulate your thoughts; think aloud; listen and adapt |
| Business judgment | Whether the answer would survive a real client Monday | Business intuition; creativity; what works in practice |
I did not invent parallel universes called "presence," "creativity index," or "spike score." Those words show up in folklore and in private interviewer notes. CoachNed scores the seven above and nothing else. There are no published firm weights wired into the product, and there is no pass mark I am pretending McKinsey, BCG, or Bain shared with me.
What happens after a live voice case
The debrief attaches to the live voice case with Ned — roughly eighteen minutes on a case like CopperCup — not to a typed chat summary. After you finish, you get seven rows. Each row has three parts:
- A score for that dimension.
- A short note in plain English about what went well or what cost you.
- A quote from your transcript — your words, not a paraphrased "you seemed unclear."
That third piece is the one most candidates underuse. The note tells you the category of mistake. The quote is the evidence. If Math is weak and the quote is "so that's about twenty percent, maybe thirty," you do not need another motivational video. You need to stop guessing ranges out loud and stage the calculation.
Each dimension also points at a drill family:
| Dimension | Drill to run next |
|---|---|
| Structuring | /drills/structure |
| Hypothesis | /drills/brainstorming |
| Math | /drills/math |
| Charts/exhibits | /drills/charts |
| Synthesis | /drills/synthesis |
| Communication | Another live voice case on /interview |
| Business judgment | Full cases on /consulting-cases, plus synthesis drills |
Communication does not collapse into a typed drill. Filler, rambling, and recovery only show up when you speak. Business judgment is not a separate flashcard set either; it shows up when you choose which branch matters and how you close. The five drill paths above cover the dimensions that improve with short, repeated reps.
How to read a debrief without lying to yourself
Candidates usually scan for the highest number and leave happy. That is the wrong order. Read the card like an interviewer debrief sheet.
Step 1 — Find the leverage row, not the average. Look at the lowest score, then read its note and quote before you look at anything else. One stubborn weak dimension will sink a first round faster than three middling ones.
Step 2 — Believe the quote. If the note says your structure was generic and the quote is "I'd look at the three Cs," the machine is not being mean. You reached for a framework name instead of a case-specific tree.
Step 3 — Run one matching drill the same day. Not five. One. Structure for structuring. Math for math. Charts for exhibits. Synthesis for the close. Brainstorming when the hypothesis was thin or unfalsifiable.
Step 4 — Re-run a full voice case two or three days later. The next debrief is the validation. If the same quote pattern returns, you have a habit, not a one-off miss.
Ned's rule. Treat the weakest row as the entire assignment. A candidate who moves one dimension from "soft" to "reliable" across three cases usually gains more interview credibility than a candidate who grinds ten full cases without reading a single note.
A worked example you can reproduce
Suppose you just finished CopperCup. Margin is under pressure. You structured around "revenue and cost," never named the channel mix, guessed the contribution math, misread a small exhibit on delivery fees, and closed with three options instead of one recommendation. A plausible debrief might look like this (illustrative scores, not a template you should chase):
| Dimension | Score | Note (compressed) | Transcript quote |
|---|---|---|---|
| Structuring | 5 | Tree stayed at revenue vs cost; no channel or mix branch | "I'd look at revenue and costs" |
| Hypothesis | 6 | Directionally fine, not falsifiable | "Maybe delivery is the issue" |
| Math | 4 | Skipped units; rounded mid-sentence | "so like twenty or thirty percent" |
| Charts/exhibits | 5 | Read the fee line, missed the volume interaction | "fees are up, so that's bad" |
| Synthesis | 4 | Listed options; no single ask | "they could cut costs or raise prices" |
| Communication | 7 | Clear enough; recovery after pushback was slow | — |
| Business judgment | 5 | Recommendation would not survive a CFO challenge | — |
Now do the arithmetic of practice, not of vanity. If Math and Synthesis are the floors, tomorrow is not "do another full case and hope." Tomorrow is twenty minutes on /drills/math (state the formula, stage the steps, translate the number into a sentence a CFO would accept), then fifteen minutes on /drills/synthesis (one recommendation, three supports, one risk, one next step). Two days later, another /interview voice case. You are testing whether those two rows moved. That is the loop the seven-score format was built for.
What a machine score cannot judge
I will say this plainly, because prep products rarely do. A voice debrief can grade the shape of your problem-solving. It cannot grade whether the interviewer liked you. It cannot grade Personal Experience Interview authenticity, office fit, or how you would handle a partner who is having a bad Tuesday. It cannot know whether your "business judgment" would survive a real client who refuses the obvious answer for political reasons.
It also cannot invent firm-specific confidential weights. McKinsey, BCG, and Bain do not publish a public seven-dimension sheet with pass marks. When prep sites claim otherwise, you are reading folklore. CoachNed scores the seven practice dimensions I chose because they map cleanly to what those firms say they assess and to drills you can actually run. Use the scores as a training instrument. Do not treat them as a prediction of an offer.
Access, without the usual fog
I built the product. Everything is open for seven days with no card. After that, a Season Pass is $120 for ninety days, or Pro is $49 a month. The live voice case and the seven-score debrief sit at /interview. The matching drills sit under /drills/structure, /drills/brainstorming, /drills/math, /drills/charts, and /drills/synthesis. Pricing detail is on /pricing.
CoachNed is not affiliated with McKinsey, BCG, Bain, Deloitte, or any firm named above.
Practice this today
Run one live voice case on /interview. When the debrief lands, write down only the lowest dimension, its note, and its quote. Do not open a second case. Open the matching drill from the table above and do ten to twenty minutes on that skill alone. If Communication is the floor, skip the typed drills and book a second voice case after you have cleaned the content dimensions. That is a single afternoon's work, and it is more useful than another undifferentiated "practice case."
Frequently asked questions
What are CoachNed's seven case interview dimensions?
Structuring, Hypothesis, Math, Charts/exhibits, Synthesis, Communication, and Business judgment. Each is scored after a live voice case, with a note and a quote from your transcript. Those seven are the full set; there are no extra hidden rows.
Does CoachNed use McKinsey's or BCG's official scoring sheet?
No. Firms do not publish an official public seven-dimension sheet with those labels and weights. The seven scores are CoachNed's practice rubric, built to match the moves McKinsey, BCG, and Bain describe on their careers pages and to map each weakness to a drill.
How is this different from a single ChatGPT case grade?
A blended score collapses seven different failure modes into one number. CoachNed keeps the rows separate, pins each to something you said, and points you at a specific drill family. The action changes depending on which row is weak.
Which dimension should I fix first?
The lowest one. If two are tied, fix Math or Synthesis before polishing Communication — a clear delivery of a wrong close still fails the interviewer's sheet.
Can I see a seven-score debrief without paying?
Yes. Everything is open for seven days with no card, including the live voice case and debrief. After the free week, Season Pass is $120 for ninety days or Pro is $49 a month.
Sources
- Interviewing at McKinsey — problem-solving interview framed as a client scenario evaluating analytical thinking and approach. Checked 2026-09-24.
- McKinsey sample case: Transforming a national education system — public coaching on organizing thoughts, reading charts, and talking through calculations. Checked 2026-09-24.
- BCG Case Interview Preparation — structure, questions, data, calculations, prioritization, clear communication, business intuition and creativity. Checked 2026-09-24.
- Bain case interview preparation — how you think and structure; tips on clarifying, structuring, thinking aloud, listening, and emphasizing key points. Checked 2026-09-24.
- Bain interviewing — logical, structured problem-solving; precision and creativity; no single right answer. Checked 2026-09-24.