Q:How do I choose a north star metric?

The sources agree that the North Star Metric is tied to strategy rather than being just a dashboard number. Lenny Rachitsky frames it as your strategy, and his guide draws on a survey of employees at over 40 growth-stage companies¹. For an interview-style test, Lenny's analytical thinking playbook says to define it so specifically that a data scientist could query it, with a time frame, and to pair it with guardrail metrics².

01Frame it as strategy

• Rachitsky argues that choosing a North Star Metric is really choosing how a company will win, so it should shape what the whole team optimizes for¹.
• Marty Cagan's framing of strategy as the overall approach and rationale for reaching a goal supports this view⁷.

02Make it specific and measurable

• Define it so someone could implement it tomorrow, include a time frame such as weekly, and avoid averages or ratios that can rise while the ecosystem shrinks².
• Pick a metric that reflects value created across ecosystem players, not a single side of the business².
• Example from the same playbook: "total streaming hours per week" for Spotify, with guardrails to prevent the product becoming a passive platform².

03Check the link to revenue

• The closer the North Star sits to revenue, the more it suits a GM-style structure; metrics further from revenue, like engagement, tend to fit functional models⁵.
• Pair engagement with a sentiment counterweight so you don't optimize engagement at satisfaction's expense, as Torres notes with Meta⁶.