Sizing a Drone Fleet for Amazon Package Deliveries Across New York City

Estimate how many drones Amazon would need if every package it delivers in New York City were delivered by drone. Walk through your equation, the assumption behind each input, the arithmetic, and how you would check that the final number is reasonable. ```hint Two numbers to divide Split the problem into how many packages must be delivered on a given day and how many deliveries one drone can complete in a day. Most of the interesting assumptions hide in the second number. ``` ### Clarifying Questions - Does "every package" include heavy or bulky items a drone may not be able to lift, or should I treat all packages as drone-eligible? - Should the fleet cover an ordinary day or the holiday-season peak, and can trucks absorb overflow on peak or bad-weather days? - Does each flight carry a single package, and do drones launch from a few large warehouses or from many small hubs across the five boroughs? - What daily flying hours should I assume, given noise and daylight limits? ### What a Strong Answer Covers - A clear equation that separates daily demand from per-drone daily capacity and adds a buffer for maintenance and spares - A daily package estimate for New York City built from labeled assumptions, with a cross-check from a second angle - Per-drone capacity derived from trip distance, speed, delivery and turnaround time, operating hours, and time lost to weather and uneven demand - Correct arithmetic, a sanity check against a familiar reference, and the sensitivity of the answer to its least certain inputs - New York-specific limits such as high-rise drop-offs, crowded airspace and payload limits ### Follow-up Questions - How does the fleet change if every order must arrive within one hour of being placed? - Which single assumption moves the answer most, and how would you pin it down with real data? - Most residents live in apartment buildings without a yard. How does that change the drop-off step and your estimate?