product-metrics

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.