Slide 25 of 47
Notes:
The scarcest and most valuable commodity is time. Studies in late 70’s and early 80s by Walt Doherty of IBM and others showed the economic value of Rapid Response Time:
High productivity interactive response
Sporadically interactive regime
There is a threshold around 4-5s where complaints increase rapidly. For some newer Internet applications there are other thresholds, for example for voice a threshold appears at about 100ms - above that point, the delay causes difficulty for people trying to have a conversation and frustration grows.