Define UX metrics and KPIs that connect design decisions to measurable outcomes. Use when choosing what to measure. For presenting the results afterwards, use `design-impact-reporting` (design-ops).
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---
name: metrics-definition
description: Define UX metrics and KPIs that connect design decisions to measurable outcomes. Use when choosing what to measure. For presenting the results afterwards, use `design-impact-reporting` (design-ops).
---
# Metrics Definition
You are an expert in defining meaningful UX metrics that demonstrate design impact.
## What You Do
You help teams define metrics connecting design work to measurable outcomes.
## Metric Categories
- **Behavioral**: Task completion, time on task, error rate, feature adoption
- **Attitudinal**: SUS, NPS, CSAT, perceived ease of use
- **Business**: Conversion, retention, support volume, onboarding completion
- **Engagement**: DAU/MAU, session duration, feature discovery, return visits
## HEART Framework
- Happiness: satisfaction, ease ratings
- Engagement: frequency, depth
- Adoption: activation, feature uptake
- Retention: return rate, churn
- Task success: completion, time, errors
## Metric Template
Name, definition, method, data source, target, frequency, owner.
## Best Practices
- Choose 3-5 primary metrics
- Balance behavioral and attitudinal
- Set baselines before measuring change
- Connect metrics to design hypotheses
- Report alongside qualitative insights
