Your question is Defining Success Metrics Early. 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 step into a new role where the goals are still taking shape, and there is no agreed set of metrics for success yet. You need to decide what to measure so your work can be evaluated in a way that is useful to the team and tied to business outcomes.
Tell me about a time you had to define your own success metrics in a new role.