# REL 12. How do you test reliability?
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After you have designed your workload to be resilient to the stresses of production, testing is the only way to verify that it will operate as designed, and deliver the resiliency you expect.

**Topics**
+ [REL12-BP01 Use playbooks to investigate failures](rel_testing_resiliency_playbook_resiliency.md)
+ [REL12-BP02 Perform post-incident analysis](rel_testing_resiliency_rca_resiliency.md)
+ [REL12-BP03 Test scalability and performance requirements](rel_testing_resiliency_test_non_functional.md)
+ [REL12-BP04 Test resiliency using chaos engineering](rel_testing_resiliency_failure_injection_resiliency.md)
+ [REL12-BP05 Conduct game days regularly](rel_testing_resiliency_game_days_resiliency.md)