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Task success rate 0:35
A 35-second explainer of Task success rate, narrated over the same demo you can try yourself.
Try the interactive Task success rate demo
What this video covers
Task success rate is the percentage of users who complete a task - for example, four out of five users finishing it, which equals 80%. It’s the simplest way to see if something works, though it’s easy to overinterpret.
With five users, one person flipping from fail to pass swung the score twenty points. With twenty, the same flip barely moved it. The number didn't get more honest when it got more stable - it just stopped lying so loudly. A success rate without a sense of its sample size is a confident-looking guess.
