Chapter 2 – Testing Throughout the SDLC
Blue-Green Deployment – ISTQB Definition
Last Updated: July 12, 2026 · SoftwareTestPilot QA Team
Official ISTQB Definition
A release technique that reduces downtime and risk by running two identical production environments called Blue and Green and switching traffic between them.
In simple words
Deploy the new version to an idle stack, then flip the router to it.
Exam tip
Blue-green makes rollback trivial — flip back to the other stack.
Related terms
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