THE CASESIGHTS BLOG

The thinking behind the offer — written down.

How consultants actually reason, how to build that thinking before your interview, and what the prep market never taught you.

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From the blog

Insights on case interviews, consulting careers, and interview preparation.

McKinsey PEI: What Interviewers Actually Score, and How to Structure Stories That Survive 15 Minutes of Probing

The PEI carries 50% of the assessment. Most candidates underprepare for it by a factor of ten. Here's what interviewers are actually listening for — dimension by dimension, sub-skill by sub-skill.

The MECE Toolkit: 5 Tools to Structure Any Case

Most guides explain what MECE is. This one teaches you how to do it — with 5 operational tools, a clear priority order, and worked examples.

MECE with Algebra: Structure Any Case as Math

Algebra is the first MECE tool to try in any case interview. Learn how to decompose revenue, cost, and profit into equations interviewers cannot contest.

Process Breakdown: Structure Cases by Steps

The second MECE tool decomposes problems into sequential steps. Learn when to use it, how deep to zoom, and why it is your go-to for bottleneck cases.

How to Build a Case Interview Framework from Scratch

The hardest MECE skill is building conceptual frameworks for problems you have never seen. Here is the 3-step method — with worked examples.

Segmentation in Case Interviews: When to Use It

Segmentation slices continuous variables into distinct groups. Learn when it strengthens your structure — and when it signals lazy thinking to the interviewer.

Antonyms in Case Interviews: The Simplest Split

Antonyms decompose problems using opposite words — fixed vs. variable, internal vs. external. Learn when this helps and when it signals generic thinking.

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