Your question is Measure Service Reliability Metrics. 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 lead an engineering team responsible for backend services that support a customer-facing product. You want a clear way to track reliability so the team can spot issues early, understand user impact, and judge whether service quality is improving over time.
What metrics would you use to measure the reliability of your team's services?