Restrata is the online assessment Oliver Wyman uses to screen candidates before live case interviews. It rewards structured problem solving under time pressure, not memorized frameworks. Prepare by drilling data interpretation, mental math, and hypothesis-driven reasoning, and always confirm the exact format in your invitation email, because firms adjust their digital assessments from year to year.
Restrata is Oliver Wyman’s online assessment, a screening step that candidates may be asked to complete before the live case rounds. Unlike McKinsey Solve or BCG’s Casey chatbot, it gets far less public coverage, which means most candidates walk in with less preparation than they would for the better-known tests. That gap is an opportunity if you prepare deliberately.
One caveat before we start: Oliver Wyman changes its recruiting process by office, practice, and hiring cycle. We do not publish exact timings or question counts here because they are not stable. Treat your invitation email as the source of truth for format, duration, and device requirements, and use this guide to build the underlying skills.
What Restrata Is Designed to Measure
Restrata is a digital problem-solving assessment, and its purpose is to screen for the same abilities the live case tests: structured thinking, quantitative reasoning, and business judgment. It exists because firms receive far more applications than they can interview, so a scalable first filter saves partner and consultant time.
Oliver Wyman’s identity helps you predict what matters. The firm leans toward financial services and quantitatively demanding work, as covered in our Oliver Wyman case interview guide. In our experience coaching candidates, assessments at quant-forward firms reward three things:
| Skill | What it looks like in an online test | How to train it |
|---|---|---|
| Data interpretation | Reading charts and tables quickly, spotting the number that matters | Timed chart-reading drills, no calculator |
| Quantitative speed | Percentages, growth rates, and ratios under a clock | Daily mental-math sets |
| Structured reasoning | Choosing the right analysis before computing anything | Hypothesis-first practice on short prompts |
Where Restrata Fits in the Process
The assessment typically sits between your application and the live interviews. A rejection here ends your candidacy before any human has seen you think, so it deserves real preparation time.
flowchart LR
A[Resume Screen] --> B[Restrata Online Assessment]
B --> C{Pass?}
C -->|Yes| D[First Round Cases]
C -->|No| E[Application Ends]
D --> F[Final Round]
F --> G[Offer Decision]
How It Differs From the Other Digital Assessments
Each firm built its screen to measure something different, so preparing for the wrong one wastes weeks. McKinsey Solve is a systems-thinking simulation, BCG’s Casey is a chatbot-led case, and Bain’s SOVA is a psychometric battery. Our full comparison of Solve, Casey, and SOVA breaks those three down side by side.
Restrata sits closer to the analytical end of that spectrum. The practical consequence is that a generic “case interview framework” memorization strategy helps less than raw analytical fluency. If you have already studied the McKinsey Solve game, reuse the hypothesis-testing habits but do not expect the same interface or scoring logic.
A Four-Week Preparation Plan
A focused plan beats scattered practice. Allocate your time by weakness, not by what feels comfortable.
timeline
title Four-Week Restrata Prep
Week 1 : Baseline timed drills : Identify weakest skill
Week 2 : Data interpretation : Chart and table speed
Week 3 : Quant under time pressure : Mental math without a calculator
Week 4 : Full mock runs : Review mistakes and refine
Week 1: Find Your Baseline
Run short timed drills across data reading, arithmetic, and logic. Record where you lose the most time, because that is where your preparation should concentrate.
Week 2: Data Interpretation
Practice extracting the one insight a chart supports before you touch a calculation. Candidates who compute first and think second burn time on numbers that do not answer the question.
Week 3: Quantitative Speed
Work percentage changes, margin and growth math, and unit conversions without a calculator. Our case math drills with instant AI feedback are built for exactly this kind of repetition.
Week 4: Simulate the Real Conditions
Practice in one sitting, on a timer, with no interruptions. Then review every miss and label the cause: misread data, arithmetic slip, or wrong approach. Each cause has a different fix.
Common Mistakes to Avoid
- Over-investing in frameworks. Frameworks help in live cases, but an online screen rewards speed and accuracy on data.
- Ignoring the clock. Spending too long on one hard item usually costs more than skipping and returning.
- Skipping the invitation details. Device, browser, and time-window requirements are easy to overlook and hard to fix on test day.
- Treating it as a formality. The assessment is a real filter, so prepare as you would for a live round.
How CasesCoach Helps You Prepare
The assessment is only the first gate. The skills it screens for are the same ones your live Oliver Wyman cases will test, so practice that builds both pays off twice.
CasesCoach offers three AI services you can use together:
- Guided Mode: the interviewer provides hints and guidance, which suits early preparation when you are still building a sense of structure.
- Expert Mode: simulates real interview pressure, which suits your final weeks when you need to perform under a clock.
- Chat with Case: walks a real case through five stages (background, framework selection, data, analysis, conclusion), so you practice breaking down an actual business problem end to end.
After each mock, you get instant AI feedback scored on five dimensions: Structure, Analysis, Communication, Business, and Math. The Math and Analysis scores map directly onto what an online assessment screens for, so they show you where to spend your remaining prep hours. For more on how scoring works, see how AI mock interviews score your performance, and compare Guided and Expert modes to pick your starting point.
Key Takeaways
- Restrata is Oliver Wyman’s online assessment and acts as a real filter before live case rounds.
- Confirm the exact format, duration, and requirements in your invitation email, since they vary by office and hiring cycle.
- Prioritize data interpretation, mental math, and hypothesis-first reasoning over framework memorization.
- Do not assume the test works like McKinsey Solve, BCG Casey, or Bain SOVA, because each measures different things.
- Use a four-week plan: baseline, data reading, quant speed, then full timed simulations.
- Review every mistake by cause (misread, arithmetic, or approach) so each fix is targeted.
Start Practicing Today
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