On Oct 10, 2007, at 11:45 PM, Kelly Muñiz wrote:

> Can anyone recommend guidelines and/or examples of performance
> requirements for user interactions with software?

Jakob (quoting Miller and Card) has response times info:

<http://www.useit.com/papers/responsetime.html>

>
> For example, if a user is using an application to perform a search
> and the software implements predictive search, how long should it
> take (ideally) from the time the user types a character until he sees
> the search matches?

This is a harder question because it deals with whether or no the  
user is expecting predictive search results. And you don't  
necessarily want it to start with the first character (or perhaps you  
do). And you might even want to manually delay the response via  
submissions throttling so the user isn't bombarded with responses.

Online, Ajax Patterns has some guidelines:

<http://ajaxpatterns.org/Live_Search>


Dan




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