SLI, SLO, SLA at Your Fingertips
Recall and apply the difference between SLI, SLO, and SLA.
What is an SLI? A service level indicator: the measurement of a user-relevant service behavior. Example: percentage of valid API requests served successfully under 300 ms. What is an SLO? A service level objective: the target for an SLI over a defined window. Example: 99.5% of valid requests under 300 ms over 28 days. Leadership says: 'Make the SLO 100% so the team takes reliability seriously.' Your line A 100% SLO says no change or failure is acceptable. A realistic SLO lets us trade speed and reliability deliberately. Agreeing to perfection turns every minor miss into policy failure. It reframes…
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