Lenny'sLens
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The definitive guide to mastering analytical thinking interviews

A step-by-step playbook to help you ace your PM interviews

2025-07-015,017 words6 claims3 podcast connections
Consensus3+ guests independently agreeSynthesisLenny combined multiple guest insightsCurationAmplified one guest's ideaOriginalLenny's own addition

Analytical thinking interviews should follow a five-step linear flow: assumptions and game plan, product rationale, metric framework, goal-setting, and tradeoff evaluation.

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Never use averages or ratios as North Star metrics because if your NSM increases while your ecosystem actually shrinks, you get a false positive — a metric that looks great even as the product dies.

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The critical 'altitude shift' from company-level metrics to team-level goals is where most candidates stumble, because tracking a metric is fundamentally different from executing against a specific goal.

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If you cannot describe a metric to a data scientist in a way that they could run a query with, it is not a useful metric — always define metrics so specifically that someone could implement them tomorrow.

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Top candidates in tradeoff evaluation specify what would need to be true for them to change their mind, because it solidifies how they think about the fundamental factors that influence their thinking.

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Outlining your game plan at the start of an analytical thinking interview is like sitting down to play a game with someone who knows the rules — it signals to interviewers that you will generate the signals they need.

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