Error Budget Burn Rate
Ratio
Measures the rate at which the error budget (the acceptable threshold of unreliability) is consumed. Monitoring this helps ensure that the service does not exceed the permissible level of unreliability.
Formula
(Consumed Error Budget / Total Error Budget)
Example
If you have an error budget of 1% downtime and currently are at 0.5% downtime, the burn rate is 0.5 / 1 = 50%.