这些因素可能包括终端用户的业务知识，他们可以如何较好地表达自己，或他们接受采访多长时间。
These factors might include the end users? business knowledge, how well they can express themselves, or how much time they have for the interview.
如何判断你需要多长时间的睡眠？
“任务分析”有助于确定用户在工作中需要完成哪些任务，他们是如何完成的，需要多长时间，犯了哪些错误。
Task analysis helps identify what tasks users perform in their jobs, how they do them, how long they take and what errors they make.
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