The AI chatbot case assessment (known as BCG Casey or BCG Online Case) is an interactive digital evaluation used by Boston Consulting Group to screen candidates before live interviews. Unlike traditional case interviews conducted with a human interviewer, the Casey assessment presents candidates with a structured chatbot interface featuring data exhibits, timed questions, and automated follow-up prompts.
If you are preparing for BCG recruiting in 2026, the Casey chatbot is almost certainly the first gate you will face. Understanding the exact format — not just the content — is the difference between advancing to the interview round and waiting 12 months to reapply. This guide breaks down everything we know from analyzing 500+ candidate debriefs collected by the DrillCase research team.
What Is the BCG Casey Chatbot Assessment?
BCG Casey is an AI-powered chatbot that simulates a case discussion in a digital interface. You receive a business scenario — for example, a retail chain evaluating whether to expand into a new market — and the chatbot presents a series of 8 questions with accompanying data exhibits. Each question is individually timed, and your answers are evaluated automatically.
The assessment replaced BCG's previous written case test in most offices globally. It runs in your web browser, requires no special software, and is typically administered as a take-home assessment with a deadline window of 5-14 days.
What makes Casey different from live case interviews is the lack of human interaction. There is no back-and-forth dialogue, no clarifying questions, and no chance to course-correct. You read the exhibit, answer the question, and move on. DrillCase simulates this exact dynamic in our BCG Casey chatbot simulation, which is why 92% of candidates who used our platform said the format matched the real assessment.
The 4 Question Types in BCG Casey
Based on our analysis of candidate debriefs, Casey questions fall into four categories. Each tests a different skill, and understanding which type you are facing helps you allocate time effectively.
1. Reading Data Exhibits
These questions present a chart, table, or graph and ask you to identify a specific data point or trend. The exhibit might be a revenue breakdown by product line, a market share comparison, or a cost structure analysis. The question is straightforward — can you read the data accurately?
Common mistakes: misreading axis labels, confusing percentages with absolute numbers, and overlooking footnotes that change the interpretation. Practice with our chart interpretation drills to build accuracy under time pressure.
2. Drawing Conclusions from Charts
These go beyond data reading. You are presented with an exhibit and asked to identify the most significant insight, the primary driver of a trend, or the best conclusion supported by the data. Multiple answer choices may seem partially correct, but only one is fully supported by the exhibit.
The key skill here is distinguishing between what the data shows versus what you might assume. Casey is testing your analytical rigor, not your business intuition.
3. Making Business Recommendations
After reviewing exhibits and analysis, you are asked which course of action the client should pursue. These questions test synthesis — can you combine multiple data points into a coherent recommendation? The answer choices often include a clearly wrong option, two plausible options, and one that best integrates all the evidence presented.
4. Interpreting Quantitative Data
These are the math-heavy questions. You may need to calculate a percentage change, estimate a market size from given inputs, or determine break-even points. Time pressure is most acute here because the calculations must be done mentally or on scratch paper — there is no calculator provided in the Casey interface.
DrillCase's mental math drills are specifically calibrated to the difficulty level of Casey quantitative questions, covering percentages, ratios, and market math at MBB speed.
Time Limits and Format Details
| Parameter | Detail |
|---|---|
| Questions per case | 8 |
| Total time | ~25-30 minutes |
| Time per question | Individually timed (varies by question type) |
| Can you go back? | No — once submitted, answers are final |
| Calculator allowed? | No in-interface calculator |
| Exhibits | Charts, tables, graphs embedded per question |
| Interface | Web-based chatbot — runs in standard browsers |
| Deadline window | Typically 5-14 days from invitation |
How BCG Casey Scoring Works
BCG does not publish the exact scoring methodology, but our analysis of candidate debriefs reveals consistent patterns. Scoring appears to be based on three dimensions:
- Accuracy: Whether you selected the correct answer. This is the primary scoring dimension — there is a right answer for each question.
- Speed: How quickly you answered relative to the time limit. Faster correct answers appear to score higher than slower correct answers, though accuracy always takes precedence.
- Consistency: Your performance across all 8 questions is evaluated holistically. Strong performance on 7 questions with a clear miss on 1 appears to be weighted differently than mediocre performance across all 8.
The scoring threshold for advancement varies by office, role level, and applicant pool. There is no fixed "passing score" that applies universally.
5 Common Mistakes That Trip Up 80% of Candidates
From our database of candidate debriefs, these are the five most frequently reported errors:
Mistake 1: Treating It Like a Case Interview
Candidates who prepare exclusively with traditional case frameworks (profitability trees, market entry matrices) are preparing for the wrong format. Casey is a timed digital assessment with exhibits — not a conversation.
Mistake 2: Not Practicing Under Time Constraints
Reading about Casey is not the same as experiencing the time pressure. Candidates who practiced with untimed materials consistently reported being surprised by how little time each question allows.
Mistake 3: Rushing Through Exhibits
The exhibits contain all the information you need. Candidates who scan quickly and rely on intuition miss data points that change the correct answer. Spend at least 40% of your time per question reading the exhibit carefully.
Mistake 4: Second-Guessing Without Being Able to Go Back
Because you cannot return to previous questions, candidates who dwell on uncertainty waste time that could be spent on subsequent questions. Commit to your answer and move forward.
Mistake 5: Skipping Quantitative Practice
The math in Casey is not advanced, but it must be done quickly and accurately without a calculator. Candidates who neglect mental math practice lose points on questions they could have answered correctly with another 30 seconds of computation speed.
How to Prepare with DrillCase
DrillCase offers 20 full BCG Casey chatbot simulation cases — that is 160 practice questions in the exact format you will face on test day. Every case is reconstructed from real candidate debriefs, not textbook theory.
Our simulations enforce the same constraints as the real Casey assessment: individual question timers, no going back, embedded data exhibits, and the chatbot interface format. Candidates who complete at least 10 practice cases before their assessment report significantly higher confidence and performance.
Complement your Casey prep with our free tools: Mental Math Drills for quantitative speed, Chart Interpretation Practice for exhibit reading accuracy, and the 5-Minute AI Demo to experience DrillCase's simulation quality before committing.
Ready to see the Casey format before test day?
Try BCG Casey SimulationFrequently Asked Questions
How many cases are in the BCG Casey assessment?
The BCG Casey assessment typically consists of one case with 8 questions. The case includes a mix of data exhibits, charts, and business scenarios. Each question is timed individually, and you cannot go back to previous questions once submitted. DrillCase offers 20 full Casey simulation cases — 160 total practice questions — so you can experience the format multiple times before your real assessment.
Can you go back to previous questions in BCG Casey?
No. Once you submit an answer in the BCG Casey chatbot, you cannot return to previous questions. This is one of the most important format differences from traditional case interviews. Each answer is final, which makes reading the question carefully and managing your time per question critical to your success.
Is the BCG Casey the same as a case interview?
No. The BCG Casey chatbot is a digital assessment with a structured chatbot interface, data exhibits, and timed multiple-choice or short-answer questions. A traditional case interview is a live conversation with a human interviewer. The Casey assessment happens before the case interview stage — it is a screening tool. Many candidates prepare exclusively for live cases and are caught off guard by the digital format.
How long does the BCG Casey assessment take?
The BCG Casey assessment takes approximately 25-30 minutes to complete. It consists of one case with 8 questions, each with individual time limits. While 30 minutes may seem short, the time pressure is significant because each question requires reading exhibits, interpreting data, and formulating answers within strict time constraints.
Related Assessment Prep
BCG Casey Chatbot Simulation
Practice with 20 full Casey simulation cases built from real candidate debriefs. Experience the exact chatbot interface, exhibit formats, and time pressure.
Mental Math Drills
Build the quantitative speed you need for Casey's math-heavy questions. Timed drills calibrated to MBB difficulty.
Chart Interpretation Practice
Practice reading the chart and exhibit types that appear in BCG Casey assessments.