Choosing a north-star metric, diagnosing a drop, guardrail metrics, and estimation questions.
3 questions in Product Management.
Rule out instrumentation before behaviour, then segment along the dimensions that isolate a cause — platform, geography, cohort, and acquisition channel — to distinguish a broad drop from a concentrated one, since those have entirely different explanations.
Ratios improve when the denominator shrinks and averages improve when the mix shifts, so a rate can rise while every underlying cohort worsens; you catch it by pairing every rate with its absolute counts, decomposing by segment, and defining guardrails before launch.
Build the number from a baseline and named mechanisms rather than accepting it, because a target with no route attached is a wish that will be met by lowering the definition. Decompose the growth into drivers, state what each is worth, and say plainly which portion of the gap has no plan behind it.