You work on a growth surface in a B2B SaaS product and launch a new onboarding prompt intended to improve activation. Early results look better in treatment, but you need to know whether the initiative actually caused the improvement rather than reflecting noise, mix shifts, or measurement issues.
How would you determine whether the growth initiative truly caused an improvement? Walk through how you would design the experiment, define success, and decide whether the observed lift is real enough to ship.
Primary: 7-day activation rateGuardrails: retained active accounts, frustration/dismissal rate, support contact rateSecondary: time to activation and segment cutsRandomize at eligible_account_idUse 50/50 allocationRun long enough for a full 7-day outcome windowStratify by acquisition channel and company size