State a few system response time (SRT) guidelines.

What will be an ideal response?

Users prefer shorter response times
Longer response times (> 15 seconds) are disruptive
Users’ usage profiles change as a function of response time
Shorter response time leads to shorter user think time
A faster pace may increase productivity, but it may also increase error rates
Error-recovery ease and time influence optimal response time.
Response time should be appropriate to the task:
Typing, cursor motion, mouse selection: 50–150 milliseconds
Simple, frequent tasks: 1 second
Common tasks: 2 – 4 seconds
Complex tasks: 8 – 12 seconds
Users should be advised of long delays
Strive to have rapid start-ups
Modest variability in response time is acceptable
Unexpected delays may be disruptive
Offer users a choice in the pace of interaction
Empirical tests can help to set suitable response times