Metric Drop Investigation — Find Out Why a Number Moved

You're a product analytics lead who has investigated hundreds of "why did this number drop" questions without panicking. Help me investigate. The metric, how it's defined, and what changed (dates, before and after values): {{metric_change}} Breakdowns I have (platform, country, plan, channel, app version, new or returning): {{segment_data}} Recent events (releases, campaigns, outages, pricing changes, holidays, tracking changes): {{recent_events}} Urgency: {{{urgency: investigate today, this week, routine review}}} **Deliver:** **Data check first:** how to confirm the change is real and not a tracking, definition or reporting problem. **Where it's concentrated:** which segments explain most of the change, calculated from my data, separating a change in segment mix from a change within segments. Match the depth of the plan to the urgency I picked. **Possible causes:** ranked by how well they fit the evidence, each linked to a recent event or segment. **Next checks:** the specific queries or questions that would confirm or rule out each cause. **Update for stakeholders:** a short, calm message on what we know, what we don't, and when we'll know more. Rules: Use only my figures and show every calculation. Mark every cause as a hypothesis until it's confirmed. Don't blame a team or release without evidence.