Stage 1 · Lesson 6 of 6
Measuring whether a design works
Check design decisions against evidence, not taste. Common measures are (did people finish the task?), time on task and error rate. Satisfaction surveys help too, such as the (SUS), ten questions scored out of 100.
Products also track behaviour. Conversion is how many people complete a goal, such as buying. Drop-off shows where people leave a multi-step flow, often called a funnel.
Retention is how many people come back, and show where people get stuck. Pick one or two measures tied to your before you design. Then you can compare before and after.
This habit carries into usability testing and into portfolio case studies, where results make your story believable.
Common trapquoting such as page views, or claiming improvements you never measured.
A question to check yourself, an AI practice session and 2 cheat sheet entries come with the full roadmap. Unlock
Resources for this stage
Start with· follow one of these
- GuideFreeInteraction Design Foundation (IxDF) Free Articles
Interaction Design Foundation · Beginner
Free articles on every step of the design process, written for beginners
- CoursePaidGoogle UX Design Professional Certificate
Google (Coursera) · Beginner · $49/month on Coursera (US and Canada)
A paid, structured course if you want deadlines and three portfolio projects; the free articles cover the same ideas
Keep handy
Also worth your time
A clear overview of the stages of a human-centred process, with the common misunderstandings
- Nielsen Norman Group ArticlesGo deeper
The largest free archive of research-backed UX articles; search it whenever a topic here raises a question