SLO/SLI

Kind: constraint

Layer: Observability

Aliases: Service Level Objective, Service Level Indicator, Objective Reliability Targets

Record: architecture:slo-sli

Severity: contextual

Scope: service, reliability, operations

Canonical: Ontology

A rule or precondition that a service's reliability is stated as a measured indicator with an objective and an error budget over a window.

Listed in Architecture principles, after Distributed Tracing and before Dashboards.

Requires

• Monitoring

Reinforces

• Observability
• Alerting

Enables

• Error-Budget Decisions

Conflicts with

• Vague Reliability Goals

In tension with

• Feature Velocity

Tensions

• SLO/SLI / Feature Velocity

Violated by

• Vague Reliability Goals

Refactored by

• Service Level Objectives

Severity

• contextual

Category

• Observability / Auditability / Traceability

Linked from

• Observability / Auditability / Traceability
• Observability / Auditability / Traceability
• Severity levels
• The resolutions