How to collect users' task completion times?

1. How to measure the time to complete tasks in usability testing?
2. What is task completion time?
3. Is time on task recorded with every test?

How to measure the time to complete tasks in usability testing?

During a typical usability study, simply collect the times it took to accomplish a task. The best way to do this is to measure time per screen or activity in addition to the duration of the task, so that you'll be able to isolate which step of a process is taking the most time or adding unnecessary seconds.

What is task completion time?

a measure of the time it takes a user to perform a task (from start to finish). This is a typical metric in usability evaluation.

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.