If a service provider is offering 99 percent uptime, that’s 2 nines of uptime. It’s really telling its customers that, on average, they’ll experience just over 7 hours of downtime in any given month. Is that enough? It depends; it might be good enough for workloads that aren’t critical to enterprise survival, but it’s woefully lacking for critical workloads.
But what exactly does Microsoft’s “99.9-plus” percent uptime statement mean — 99.9001 or 99.999? There’s a huge difference. Let’s do some quick math:
For many businesses, I guess 99.9% uptime is quite good.Removal.ai
Because of the losses in the early days, which get bigger the more successful the company is at acquiring customers, it is much harder for management and investors to figure out whether a SaaS business is financially viable.
The median average contract length is 1.3 years and the average billing term is seven months in advance in 2016. Comparable to 2015, with average contract length shortening from 1.5 to 1.3 years and average billing period increasing by one month from 2015 to 7 months