SLOs, SLIs, and Error Budgets: A Practical Implementation Guide

A step-by-step checklist for defining service level objectives, picking the right service level indicators, and using error budgets to make better decisions about reliability vs. feature velocity.

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Identify your critical user journeys

Critical

Pick SLIs that reflect real user experience

Critical

Set SLO targets based on actual data, not wishful thinking

Critical

Calculate and track your error budget

Critical

Set up burn rate alerts instead of threshold alerts

Critical

Build an error budget dashboard everyone can see

Write an error budget policy and get sign-off

Critical

Instrument your code to emit SLI metrics

Critical

Use rolling windows, not calendar windows

Automate weekly SLO status reports

Define a clear response process for SLO violations

Keep your SLOs tighter than your SLAs

Track SLOs per endpoint, not just per service

Review and adjust SLOs every quarter

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