Diagnose and respond to a 35% fall in DoorDash iOS app installs

DoorDash's iOS app is getting 35% fewer installs than before. As the product manager, how would you work out what is causing it and what to do about it? ```hint Read the shape first Before guessing at causes, ask what the drop looks like: when it started, whether it happened overnight or slowly, and whether Android moved at the same time. ``` ### Clarifying Questions - Over what window is the 35% measured, and against which comparison: the previous week, the previous month or the same period last year? - Did installs fall overnight or decline over several weeks? - Does "installs" mean first-time installs only, and which source reports it: Apple's store reporting, our attribution tool or our own app-open events? - Is the drop in every market the app serves, and is the Android app affected too? ### What a Strong Answer Covers - Confirming the drop is real by checking the metric definition, data sources and recent instrumentation changes - Describing the drop by timing, platform, market, acquisition channel and store funnel stage before naming causes - Internal and external hypotheses specific to an iOS install funnel, ranked and paired with a check for each - Connecting installs to new customers and first orders to size the business impact - A response plan with fixes, communication and alerting that would catch the next drop sooner ### Follow-up Questions - Installs from paid campaigns fell while organic installs are flat. What do you check next? - Installs are down 35%, but first orders from new customers are down only slightly. What does that tell you, and does it change your priority? - How would you set up monitoring so a drop like this is caught within a day?