I am sure you know this but 1 day fail is actually 86% success. And even further on that line your SLA states that a partial day fail lets say 85% uptime on monday should count as a 100% day fail over a week time period? That seems very weird to me. Every SLA I have ever dealt with has been % uptime/speed required over a month or week period -- some with different weights for business hour services etc. I am very curious to as how your SLA is worded where your example makes sense.