Chaos Testing Principles

Controlled failure injection to build confidence in system resilience.

When to Invoke

• Verifying system resilience before production deployment
• Designing game day exercises
• Testing circuit breakers, retries, and failover
• Validating disaster recovery plans

Methodology

1. Define Steady State

Identify measurable indicators of normal system behavior:

• Request success rate ≥ 99.9%
• P99 latency < 500ms
• Error rate < 0.1%