Your question is Troubleshoot Failed Deployment Pipeline. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're working on a deployment pipeline and a release fails during rollout. You need a clear way to isolate whether the problem is in the build, configuration, environment, artifact, or post-deploy validation.
Given a scenario where deployment fails, how would you troubleshoot the issue?