attainment
A number between 0 and 100 that represents the success percentage of your application compared to the goal set by the SLO.
If this is a period-based SLO, the number is the percentage of time periods that the service has attained the SLO's attainment goal, as of the time of the request.
If this is a request-based SLO, the number is the number of successful requests divided by the number of total requests, multiplied by 100, during the time range that you specified in your request.