Tier 1
Reach
What percentage of eligible users activated the feature at least once during the measurement period?
Threshold: Below 20% after 90 days
Fail means: Feature is not visible enough or not relevant to users' workflows.
Tier 2
Frequency
Among users who tried it once, what percentage used it again in the following two weeks?
Threshold: Below 30% two-week retention
Fail means: The AI output wasn't good enough or the interaction model required too much effort.
Tier 3
Impact
Does feature usage correlate with downstream outcomes? Retention, NRR, time-to-value, expansion revenue.
Threshold: No statistically meaningful correlation
Fail means: The feature is pleasant but not connected to your core business model.