"The Uptime Institute Tier levels provide a good idea of what to achive, and why one would like to achieve them. They are based on a US approach, but in itself not bad. In many ways it's better than the TIA942 Tier 3 classification, which is…"

"I have been managing a datacenter which used (do not laugh) DX units. It achieved 1.52 over time, but I have to add that all kit was new, ie. 2 years and younger. I'm no longer involved with the specific company so I cannot tell you how it is…"