Measure what matters: define a North Star metric that captures delivered value, decompose it into 3-5 movable input metrics, distinguish vanity (cumulative totals) from actionable (rates/cohorts/retention), set guardrails, and judge outcomes vs a baseline.
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---
name: product-metrics
description: "Measure what matters: define a North Star metric that captures delivered value, decompose it into 3-5 movable input metrics, distinguish vanity (cumulative totals) from actionable (rates/cohorts/retention), set guardrails, and judge outcomes vs a baseline."
---
# Product Metrics
## North Star + inputs
One metric = value customers get; decompose into **3-5 input metrics** a team can move. Signups-while-ignoring-retention is theater.
## Vanity vs actionable
Cumulative totals/raw counts flatter; **rates, cohorts, retention** reveal. Drop metrics you can't act on.
## Guardrails
Name what you must not harm (don't grow signups by tanking conversion).
## Judge outcomes
Did the target metric move vs **baseline/control**? Significance -> `applied-statistics`. A ship that moved nothing is a learning — say so.
