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May 6, 202611 min readReliability

SLO Burn-Rate Alerting That Reduces Noise

Designing multi-window burn-rate alerts that catch real reliability regressions early without paging teams for harmless variance.

Burn-rate alerts work best when tied to action policies, not generic severity labels.

Two-Window Pattern

  • Fast-burn window detects acute incidents.
  • Slow-burn window detects chronic erosion.
fast: 1h window, burn > 14x
slow: 6h window, burn > 4x

Alert design should optimize decision quality, not chart sophistication.

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