Metrics question
How would you find if a customer is brand agnostic or not when shopping?
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What this question tests
Tests designing a behavioral metric to infer brand loyalty versus price or convenience-driven shopping, from indirect signals rather than a direct survey question.
How to approach it
- Clarify the goal: distinguish customers who consistently choose a specific brand regardless of price or alternatives from those who treat brand as interchangeable.
- Identify behavioral signals: branded versus generic-category search terms, repeat-purchase rate of the same brand when similarly priced substitutes exist, and brand switching after a price increase.
- Propose a brand loyalty index combining branded-search share, same-brand repurchase rate, and price elasticity of brand choice, scored per customer or segment.
- Address a confound: low repurchase of a brand could reflect low product satisfaction rather than brand agnosticism, so pair the metric with review or return-rate data.
- Segment by category, since brand agnosticism varies hugely between commodity goods like batteries and identity-driven goods like sneakers.
- Define application: target brand-agnostic segments with price and promotion-based marketing, and brand-loyal segments with retention or loyalty programs.
What a strong answer includes
- Proposes concrete, measurable behavioral proxies, branded search share, repurchase rate, price elasticity, instead of relying on self-reported preference.
- Combines multiple signals into a composite index rather than a single potentially misleading metric.
- Explicitly addresses the confound between low loyalty and low satisfaction, showing analytical rigor.
- Segments by product category, recognizing brand agnosticism varies by what's being purchased, not a fixed customer trait.
Common mistakes
- Relying only on a direct survey question, unreliable since people often misjudge or misreport their own brand loyalty.
- Ignoring category differences, treating brand agnosticism as a single universal customer trait.
Likely follow-up questions
- How would you use this metric to change marketing spend allocation?
- How would you validate the loyalty index against actual purchase behavior over time?
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Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 2: Data fluency: SQL, logs, and reading the truth yourself
- Chapter 14: Get the job: the AI PM interview loop