Diagnose a 20% ride volume decline in one Lyft market

In one of Lyft's markets, ride volume has fallen by 20%. Walk through how you would figure out why. ```hint Question the number first Before looking for a cause, pin down how the 20% was measured and what it is being compared with. ``` ### Clarifying Questions - Over what window is the 20% measured: week over week, month over month, or against the same period last year? - Did the drop arrive suddenly on a particular date, or build gradually over several weeks? - Does "rides" mean completed rides or requested rides, and do bike and scooter trips count in this market? - Is the decline limited to this market, or are other markets down as well? ### What a Strong Answer Covers - Validating the data, the metric definition and the comparison period before diagnosing. - Separating external causes (seasonality, competition, regulation, events) from internal ones (releases, pricing, incentives). - Breaking rides into a demand and supply funnel to locate the step that dropped. - Segment cuts that narrow the drop down to a specific cause. - A way to confirm the root cause and size its contribution before acting. ### Follow-up Questions - You find that completed rides fell while requests stayed flat. Where do you look next? - The decline is concentrated among Android riders. What are the likely causes, and how do you confirm one? - A competitor ran heavy rider promotions in this market during the same period. How would you estimate how much of the drop it explains?