MENTAL MODEL · M3643

North Star Metric

DecidemediumDecision Science

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Updated 2026-08-05

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INTRODUCTION

English translation pending.

CORE DEFINITION

A product strategy concept popularized by growth practitioners, notably Sean Ellis, and used widely in technology companies. Its core proposition is that a product should be steered by one metric that best represents the value users receive, such as monthly active users or nights booked, and that all teams should be accountable to it so their decisions align. The key constraint is that the metric must measure customer value rather than internal activity, and it must be reviewed periodically, because a metric that stops tracking real value silently redirects the whole organization.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Direction setting: resolve disputes between teams by asking which option moves the single chosen metric. - Metric selection: reject candidates that measure internal activity rather than value received by users. - Drift check: re-examine whether the metric still reflects real value before using it to plan the next period.

anchor

Anchor fast decisions

When several metrics compete for attention, effort is distributed across them and each decision can be justified by one of them, so no direction accumulates. Reducing the set to a single value metric forces trade-offs to be resolved explicitly rather than by whichever team argues loudest, and because the metric tracks what users receive, improvements to it tend to be genuine rather than cosmetic. The mechanism is the concentration of attention that a single shared target produces.

MINIMUM ACTION

In progress 0/1

Practice this model in one real situation:

Write down what value users actually receive from the product, in one sentence. 2. Propose two or three metrics that would rise only if that value were delivered. 3. Choose the one that is hardest to inflate without delivering the value. 4. Make every team report against it and use it to settle prioritization disputes. 5. Review quarterly whether it still tracks value, and replace it if it no longer does.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

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si-labs.comhttps://www.si-labs.com/en/articles/north-star-metricZH · Explicit
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