Industry change failure rates up 30%; here is how to calculate yours without vendor tools

Cortex's 2026 benchmark reports that change failure rates have risen approximately 30% industry-wide since AI-assisted coding became widespread, yet most engineering teams cannot cite their own figure. DORA defines change failure rate as the percentage of production changes that degrade service and require remediation such as a rollback, hotfix, or patch. A team can calculate its CFR in an afternoon using existing data from CI pipelines and incident management tools like PagerDuty or Opsgenie, without any dedicated vendor platform. The core formula divides failed production changes by total production changes, excluding fix-only deployments from both the numerator and denominator. DORA's 2025 report found that only about 16.7% of teams achieve the elite benchmark of 4% CFR or below, underscoring how widely the metric is undertracked.