This question already has an answer here:

Are there any scientific papers about any study performed on what is considered a maximum waiting time for an activity to be considered "user real-time" (not software real-time).

I was looking at something along the lines of "maximum waiting time for a web page to render" and the user's perception of real-time.

For instance empirically, we can state that waiting 200 ms would be real-time whereas waiting 10 seconds would not, but I was hoping to find some citation for it in scientific literature.

I've tried some resources (eg Google Scholar) but to no avail.

Thank you.

marked as duplicate by rk., Charles Wesley, msanford, Graham Herrli, Marjan Venema Jul 13 '13 at 10:29

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.


In Chapter 3 of Designing and Engineering Time by S.Seow there are list of standards which consern time and user experience. In average, "user real-time" response is in interval of 0.2-1.0 sec.

Not the answer you're looking for? Browse other questions tagged or ask your own question.