Hashrate Assurance: A program towards 100% uptime in hosting facilities.⌗
Even in the ideal world of free energy and 100% facility uptime, you will still have the issue of machine level failure. While ASICs are incredibly robust machines, and can run for years on end without much more than periodic cleaning–inevitably something will break. Machine level ASIC issues are specific and arise from sources such as fans, control boards, chip failure, or even PSU overheating and bricking.
With extensive warranty timelines and repair facilities in short supply, miners often find themselves with many weeks of lost hashing time. This is a severe opportunity cost in the world of Bitcoin Mining that thoughtful hosts can mitigate with a bit of coordination.