Oliver Wyman Interview Prep: 2-Week Prep Plan
Official: Oliver Wyman Careers ↗
2-Week Prep Plan is enough time to prepare for Oliver Wyman interviews at 4-6 hours per day — roughly 63 hours total. The plan moves through 2 weekly phases covering Oliver Wyman's candidate-led case format and Math-Heavy Cases, and is designed for candidates with some case experience looking for structured preparation.
Duration
2 Weeks
Intensity
Intensive
Hours/Day
4-6
Risk Level
Medium
How many hours a week do you need?
Set your weeks remaining and case experience to spread this plan’s 56–84 total hours across your runway to the Oliver Wyman interview.
You need about 35 hrs/week (≈ 5 h/day) over 2 weeks.
Comfortable pace within this plan's 4–6 h/day range.
You have time to run all 2 phases as written.
Based on this plan’s 56–84 total hours (4–6 h/day × 14 days). Experience picks where you land in that range: new to cases → top, 10+ cases → bottom.
Overview
Prerequisites
- Basic business fundamentals
- Ability to dedicate significant daily hours
- Some prior case exposure
Week-by-Week Prep Schedule
- Days 1-2: Learn all core frameworks (profitability, market sizing, M&A, market entry)
- Days 3-4: Mental math fundamentals and daily drills
- Days 5-6: Research Oliver Wyman format and do 3-4 practice cases
- Day 7: Review week's learning and rest
- Days 8-10: Intensive case practice (2 cases/day)
- Days 11-12: Behavioral prep and mock interviews
- Days 13: Focus on Math-Heavy Cases
- Day 14: Light review and mental preparation
Priority Guide
With limited time, focus on what matters most. Here's how to prioritize your 2 weeks of preparation:
Must Do
Non-negotiable for interview success
- Master core frameworks (profitability, market sizing)
- Complete 8-10 practice cases
- Practice candidate-led format specifically
- Daily mental math drills (20-30 min)
- Prepare 4-5 behavioral STAR stories
- Prepare for Math-Heavy Cases
Should Do
Strongly recommended if time permits
- Learn M&A and market entry frameworks
- Practice synthesis and recommendation delivery
- Do at least 2 mock interviews
- Review your practice cases for patterns
Nice to Do
Will give you an edge
- Study industry-specific case examples
- Read about firm culture and values
- Practice with different case partners
- Review firm thought leadership
Oliver Wyman-Specific Focus Areas
Oliver Wyman has unique interview elements. Make sure your prep covers these:
Warning Signs You Need More Time
If you experience any of these during your prep, consider requesting an interview delay:
- You struggle to structure a case within 2 minutes
- Mental math takes you more than 30 seconds per calculation
- You can't articulate a clear hypothesis early in cases
- Your recommendations lack specificity and actionability
- You're completing less than half the planned practice
- Progress feels slower than expected
- Behavioral stories aren't polished yet
- You haven't done any timed practice
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