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OBSERVABILITY-BASICS4 MIN READ

Sort Evidence, Hypothesis, And Action

Classify incident notes as symptoms, evidence, hypotheses, actions, or follow-ups.

Sort each incident note by its reasoning role. Symptom Evidence Hypothesis Action Follow-up Checkout p99 latency rose from 700 ms to 4.2 seconds Customers report invoice downloads timing out Traces show tax.quote consuming 2.7 seconds on slow requests Deploy annotation shows release 831 started three minutes before errors The tax provider retry policy may be amplifying latency The new cache TTL might explain stale invoice data Route twenty percent of requests to the backup tax provider Roll back release 831 in one region and watch the error ratio Add retry-attempt metric and provider timeout class after mitigation Create postmortem action…

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