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SRE-BASICS4 MIN READ

Sort Strong and Weak SLOs

Distinguish strong SLO statements from weak or incomplete ones.

Strong SLO Weak internal metric Incomplete promise 99% of valid search requests return successful results under 600 ms over 28 days, measured at the API edge 99.9% of checkout attempts produce an order ID or clear payment decline response over 28 days Average CPU across web nodes remains under 70% during business hours The Kafka consumer lag should usually be low The app should feel fast for enterprise users Support tickets about reliability should be rare

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