Glossary · Reliability & operations
Service Level Objective (SLO)
A target range or threshold for a service-level indicator over a stated population and measurement window.
Why it matters
It translates an expected user outcome into an operating boundary for monitoring, capacity, release risk, and incident decisions.
In practice
Choose an indicator users care about, set the target from product needs rather than current performance, define the window and exclusions, and attach an error-budget policy.
Common confusion
An SLO is an internal reliability objective. A contractual service-level agreement can include remedies and may use different definitions.
Related terms
Sources
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