Advanced – Non-Functional Testing
Service Level Objective (SLO) – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A target value or range for a service level, defined for a specific metric.
In simple words
The internal target for reliability or performance — e.g. 99.9% availability.
Exam tip
SLOs are the technical target that supports the business SLA.
Related terms
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