measuring-product-market-fit
Installation
SKILL.md
Measuring Product-Market Fit
Scope
Covers
- Measuring PMF using a triangulated signal set (survey + behavior + customer evidence)
- Running and interpreting the Sean Ellis "Very Disappointed" survey (overall + by segment)
- Reading retention curves / cohort retention as PMF evidence (and knowing when they mislead)
- Using reference-customer / advocacy signals as an additional PMF proxy
- Detecting PMF drift (market shifts, rising expectations, competitive resets) and setting a re-measurement cadence
- Special handling for marketplaces (measure PMF per side; focus on the "hard side" first)
When to use
- "Do we have PMF? For which segment?"
- "Run a Sean Ellis PMF survey and tell me what it means."
- "Build a PMF scorecard with retention + survey + references."
- "Our market shifted—did we lose PMF?"
- "We want a go/no-go signal for scaling growth spend or launching publicly."
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