http://developers.de/blogs/damir_dobric/archive/2017/03/02/sla-downtime-calculator.aspxWhen thinking about SLA (Service Level Agreement) you will have to deal with numbers like 99, 99.9 availability time etc. To get a feeling what these numbers really mean, you can use following site: https://uptime.is/ Following two examples show downtimeenCommunityServer 2008 SP1 (Build: 30619.63)