On average, the downtime fell to 1.50 hours per user per year from 5.40 hours.

WSJ: The Sun Shines on 'The Cloud'

Industry analyst firms like Gartner, IDC, Aberdeen and others publish estimates of what an hour of downtime will cost the average company, and how many hours of downtime per year they are likely to experience.

FORBES: All I Want For Christmas Is...System Uptime