Time on task ux

Time on task, sometimes referred to as task completion time or task time, is another valuable metric for assessing the usability of a product. It describes the time that a user needs to complete a task successfully. The time users spend on completing a task is a measure of efficiency.

1. Why is time on task not always the best measure of usability?
2. Is time on task recorded with every test?
3. What is error rate in UX?

Why is time on task not always the best measure of usability?

It is very rare for usability studies to employ tasks that are so simple that users can perform them in a few seconds. Usually, it is better to have the users perform more goal-directed tasks that will take several minutes.

Is time on task recorded with every test?

Task times are collected in about half of formative usability tests and 75% of summative tests. Task times can be great for diagnosing usability problems. A long task time is often caused by problems with the interaction with the interface. Time on task can be collected even when users think aloud.

What is error rate in UX?

The user error rate (UER) is the number of times a user makes a wrong entry. Let's take the example of the usually unsuccessful attempt to enter the user's date of birth in the address field. The UER gives you an idea of how clear and user-friendly your website is.