Slack Alert Policy Template for Web Performance Teams

The Problem: Alerts Without a Policy Are Chaos You've got performance alerts, but nobody knows when to treat one as critical versus "review when you can." You either drown in notifications and start ignoring them, or you set thresholds so high that real issues slip through. Without a policy, your team doesn't know when to drop everything, when to acknowledge in the next standup, or how to avoid re-alerting on the same issue every hour. The solution: An alert policy. It defines: What triggers an alert When the alert fires (thresholds and conditions) Where the alert goes (channels, recipients) How the team responds (severity levels, SLAs, escalation) This template gives you a complete policy you can adopt, adapt, and paste into your team's Slack workspace or documentation. For background on what is Core Web Vitals (LCP, INP, CLS), see our practical guide; for performance budget thresholds and severity criteria, see The Complete Guide to Performance Budgets and our Performance Budget Thre