Alerts & Notifications

    Reading the alert quality scorecard

    Track false-positive rate, MTTA, and suppression stats to prove your alerting is trustworthy.

    Updated 2026-07-09
    1 min read
    scorecard
    accuracy
    metrics

    Quick answer#

    The scorecard shows four numbers per site: alerts fired, alerts suppressed, false-positive rate, and mean time to acknowledge (MTTA). Aim for false-positive rate under 10%.

    What it shows#

  1. Fired — alerts delivered to your channels this period
  2. Suppressed — alerts caught by confirmation, flapping, or hysteresis filters
  3. False-positive rate — dismissed alerts ÷ total fired
  4. MTTA — median time from fire to acknowledge

    5. Where to find it in Lemwatch#

    Insights → Alert quality scorecard (top-right of the Insights page).

    How to act on it#

  5. Open Insights → Alert quality scorecard.
  6. Sort sites by false-positive rate, descending.
  7. For sites over 15%, review the suppressed inbox to find patterns.
  8. Apply the recommended fix (confirmation gate, flap tuning, hysteresis).
  9. Re-check the scorecard next week to confirm the rate dropped.

    10. FAQ#

    How is "false positive" defined?#

    An alert manually dismissed as "not a real incident" within 30 minutes of firing.

    Can I export the scorecard?#

    Yes — CSV export lives on the same page.

    Related#

  10. Why am I getting false alerts?
  11. Suppressed alerts inbox
  12. SLA tracking
    13. Was this article helpful?

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