A/B Testing Service-Level Agreement (Annual) Calculator Examples
Explore worked annual SLA examples for A/B testing services using different availability targets, downtime levels, and measurement periods.
These examples show how changes in an annual availability target and counted downtime affect an A/B testing service's available downtime budget and effective availability.
99.9% target with downtime remaining
An experimentation platform has a 99.9% annual SLA and records 4 hours of scheduled downtime plus 1 hour of unplanned downtime.
Input Summary
SLA target
99.9%
Measurement period
365 days
Scheduled downtime
4 hours
Unplanned downtime
1 hour
Calculation Breakdown
- 1Service hours365 * 248,760 hours
- 2Allowed downtime8760 * 0.0018.76 hours
- 3Counted downtime4 + 15.00 hours
- 4Availability(8760 - 5) / 8760 * 10099.943%
Result Summary
Availability
99.943%
A/B Testing Service-Level Agreement (Annual) Calculator
The service has 3.76 hours of its annual downtime allowance remaining.
99.99% target exceeded by one incident
An A/B testing service has a 99.99% annual SLA and records 1 hour of unplanned downtime, with no counted maintenance.
Input Summary
SLA target
99.99%
Measurement period
365 days
Scheduled downtime
0 hours
Unplanned downtime
1 hour
Calculation Breakdown
- 1Service hours365 * 248,760 hours
- 2Allowed downtime8760 * 0.00010.876 hours
- 3Downtime budget remaining0.876 - 1-0.124 hours
- 4Availability(8760 - 1) / 8760 * 10099.989%
Result Summary
Availability
99.989%
A/B Testing Service-Level Agreement (Annual) Calculator
One hour of counted downtime exceeds the 99.99% annual allowance in a 365-day year.
99.5% target with a large remaining budget
A service has a 99.5% annual target, 12 hours of counted maintenance, and 10 hours of outages.
Input Summary
SLA target
99.5%
Measurement period
365 days
Scheduled downtime
12 hours
Unplanned downtime
10 hours
Calculation Breakdown
- 1Allowed downtime8760 * (1 - 99.5 / 100)43.80 hours
- 2Total counted downtime12 + 1022.00 hours
- 3Downtime budget remaining43.80 - 22.0021.80 hours
- 4Availability(8760 - 22) / 8760 * 10099.749%
Result Summary
Total counted downtime
22.00 hours
A/B Testing Service-Level Agreement (Annual) Calculator
The service remains within target with 21.80 hours of allowance remaining.
Leap-year measurement period
A provider measures the SLA across a leap year and records 6.5 hours of counted downtime.
Input Summary
SLA target
99.9%
Measurement period
366 days
Scheduled downtime
2.5 hours
Unplanned downtime
4 hours
Calculation Breakdown
- 1Service hours366 * 248,784 hours
- 2Allowed downtime8784 * 0.0018.784 hours
- 3Total counted downtime2.5 + 46.50 hours
- 4Availability(8784 - 6.5) / 8784 * 10099.926%
Result Summary
Total counted downtime
6.50 hours
A/B Testing Service-Level Agreement (Annual) Calculator
The service has 2.284 hours of downtime budget remaining in the leap-year period.
How to Read Your Results
Maximum allowed downtime is the total counted outage time permitted by the target over the selected period.
A positive downtime budget remaining indicates the recorded downtime is below the calculated allowance.
A negative downtime budget remaining indicates the entered downtime is above the calculated allowance.
Effective availability reflects recorded downtime, while availability variance shows the difference from the stated target.
Review the SLA's exclusions and maintenance treatment before relying on the result.
Assumptions & Important Notes
- All downtime entered in each example counts toward the SLA.
- The annual period is measured continuously in calendar hours.
- No event exclusions, service credits, or special rounding rules are applied.
Related Examples
Frequently Asked Questions
Can I use these examples for a monthly SLA?
No. These examples use annual measurement periods. A monthly SLA needs the applicable month length and monthly contract terms.
Why is 99.99% much stricter than 99.9%?
The extra nine reduces the allowed annual downtime from 8.76 hours to about 0.876 hours in a 365-day year.
Should planned maintenance always be included?
Only if the agreement defines it as counted downtime.
Can the calculator handle partial hours?
Yes. Downtime can be entered as decimal hours, such as 0.5 for 30 minutes.
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