A/B Testing SLA Calculator Examples
Worked monthly SLA examples showing availability, downtime allowances, excess outage time, and estimated service credits.
These examples show how billing-period length, excluded maintenance, outage duration, hourly credit terms, and monthly caps can change an A/B testing SLA result.
99.9% SLA with a small outage
A team records a 60-minute A/B testing platform outage with no eligible exclusions.
Input Summary
Billing month
30 days
Availability target
99.9%
Reported downtime
60 minutes
Excluded maintenance
0 minutes
Monthly fee
$1,000
Credit per excess hour
$100
Credit cap
25%
Calculation Breakdown
- 1Monthly minutes30 × 1,44043,200 minutes
- 2Permitted downtime43,200 × 0.00143.2 minutes
- 3Excess downtime60 − 43.216.8 minutes
- 4Estimated credit(16.8 ÷ 60) × $100$28.00
Result Summary
Estimated credit
$28.00
A/B Testing SLA Calculator
Availability is 99.861%, excess downtime is 16.8 minutes, and the estimated credit is $28.00.
Excluded maintenance prevents an SLA overage
A 31-day month includes 75 minutes of reported interruption, of which 45 minutes are valid SLA-excluded maintenance.
Input Summary
Billing month
31 days
Availability target
99.9%
Reported downtime
75 minutes
Excluded maintenance
45 minutes
Monthly fee
$2,500
Credit per excess hour
$150
Credit cap
20%
Calculation Breakdown
- 1Chargeable downtimemax(0, 75 − 45)30 minutes
- 2Monthly minutes31 × 1,44044,640 minutes
- 3Permitted downtime44,640 × 0.00144.64 minutes
- 4Excess downtimemax(0, 30 − 44.64)0 minutes
Result Summary
Excess downtime
0 minutes
A/B Testing SLA Calculator
Availability is 99.933%, there is no excess downtime, and the estimated credit is $0.00.
Credit limited by a monthly cap
A 30-day month has 12 hours of chargeable downtime against a 99.95% target.
Input Summary
Billing month
30 days
Availability target
99.95%
Reported downtime
720 minutes
Excluded maintenance
0 minutes
Monthly fee
$4,000
Credit per excess hour
$500
Credit cap
25%
Calculation Breakdown
- 1Permitted downtime43,200 × 0.000521.6 minutes
- 2Excess downtime720 − 21.6698.4 minutes
- 3Uncapped credit(698.4 ÷ 60) × $500$5,820.00
- 4Maximum credit$4,000 × 25%$1,000.00
- 5Estimated creditmin($5,820, $1,000)$1,000.00
Result Summary
Estimated credit
$1,000.00
A/B Testing SLA Calculator
Availability is 98.333%, excess downtime is 698.4 minutes, and the estimated credit is capped at $1,000.00.
How to Read Your Results
Actual availability is the observed uptime percentage after entered exclusions are removed.
Permitted downtime is the monthly outage allowance implied by the target, not an additional grace period.
Excess downtime is zero when chargeable downtime stays within the allowance.
The estimated credit is limited by the entered monthly cap and may differ from a contract calculation.
A fee-after-credit figure is an estimate of the eligible monthly fee less the calculated credit.
Assumptions & Important Notes
- Each example treats downtime as a total number of minutes within one billing month.
- Entered exclusions are assumed to be valid under the applicable agreement.
- Credits are estimated proportionally by excess downtime hours before applying the cap.
- Examples do not apply claim procedures, tax treatment, or contract-specific rounding rules.
Related Examples
Frequently Asked Questions
Why does a 31-day month allow more downtime than a 30-day month at the same SLA target?
A 31-day month has more total minutes, so the same permitted downtime percentage produces a larger minute allowance.
Can a service miss the SLA but have a small estimated credit?
Yes. A modest excess duration, a low per-hour rate, or a capped fee can produce a small estimate.
Why is there no credit when the reported outage seems long?
The chargeable portion may be within the monthly allowance after valid exclusions are removed.
Does this calculator round a partial excess hour up?
It uses proportional excess hours. A contract may instead round full or partial hours differently.
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