Your question is Diagnosing KPI Drop. 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).
A key client metric has dropped by fifteen percent week-over-week; walk me through your diagnostic framework to identify the root cause.
Explain how you would clarify the metric, validate the data, segment the decline, distinguish internal from external causes, and decide what to investigate or do next. State the analyses, stakeholder questions, and decision criteria you would use.