Chaos Engineering principles.

Chaos Engineering is the discipline of experimenting on a system to build confidence in its capability to withstand turbulent conditions in production.

Instead of waiting for an outage, you inject failure purposefully (e.g., terminating instances, simulating latency, dropping network packets). This uncovers hidden systemic vulnerabilities, confirms failover mechanisms work, and verifies alerting configurations. It must be performed carefully with a 'blast radius' defined.