Measure — Define and Track Success

Overview

If you can't define success, you can't design for it. And if you measure the wrong thing, you'll optimize for the wrong outcome.

UX measurement connects design decisions to observable evidence — did the thing we built actually help? This skill defines what to measure, how to measure it, and how to make decisions from what you learn. It bridges the gap between "we shipped it" and "it worked."

But measurement is not neutral. Every metric you choose shapes what gets optimized. Measure time-on-site and you'll get infinite scroll. Measure clicks and you'll get clickbait. Measure conversion and you'll get dark patterns — unless you also measure what those metrics cost the user. This skill guards against measurement becoming manipulation, ensuring that metrics incentivize genuine value, not engineered engagement.

When to activate this skill: Defining success criteria for a new feature, designing experiments, building measurement frameworks, analyzing funnel performance, reviewing whether existing metrics are measuring the right things, or anytime "the numbers look good" but the experience feels wrong.

Skill family

Measure works alongside the full Intent skill system: