# HEART grid · [Product or feature] · [Date] **Owner:** [PM] **Unit of analysis:** user / account / unit of work ([which]) | Category | Goal (what we want for the user) | Signal (behavior or attitude that shows success or failure) | Metric (normalized, with window) | Source (logs / survey) | Logged today? | Target | Owner | |---|---|---|---|---|---|---|---| | Happiness | | | | | | | | | Engagement | | | | | | | | | Adoption | | | | | | | | | Retention | | | | | | | | | Task success | | | | | | | | ## Rows left blank on purpose | Category | Why we are not measuring it | |---|---| | | | ## Failure signals List the signals that would show the feature failing (abandonment, undo, rejection, reversion, escalation): - - ## Notes - Engagement is reported per user or per account, never as a total. - Plan to read Happiness over several weeks after a change, to see past change aversion.