Estimate how many grocery shoppers could adopt Grocery in one year

Problem Statement Description

Product context: DoorDash is a local commerce and delivery platform; its products include restaurant delivery, DashPass, grocery and retail delivery, merchant tools, and dasher tools.

DoorDash is evaluating the one-year adoption potential for its Grocery offering among grocery shoppers. Your task is to estimate how many shoppers could adopt DoorDash Grocery within a year, using a structured guesstimate approach rather than relying on exact market data.

Frame the problem as a market-sizing and adoption estimate for a local commerce marketplace expanding beyond restaurant delivery into grocery. Consider who counts as a “grocery shopper,” what “adoption” means in this context, and how DoorDash’s existing consumer base, merchant supply, delivery reliability, pricing, and competitive landscape could influence uptake.

The estimate should be grounded in clear assumptions, simple math, and logical segmentation. You should make your scope explicit, explain the key drivers behind adoption, and identify which assumptions have the biggest impact on the final number.

The experience should consider:

- The geography and market scope you are estimating for, such as the U.S. or DoorDash-served markets

- The unit of estimation: unique grocery shoppers adopting DoorDash Grocery within one year

- A clear definition of adoption, such as placing at least one grocery order, becoming a repeat user, or using the service monthly

- The relevant population base, including households, adult shoppers, or existing DoorDash customers

- Adoption drivers such as grocery shopping frequency, delivery comfort, fees, selection, speed, and substitution from in-store trips

- Competitive alternatives including Instacart, Uber Eats, Amazon, Walmart, local grocers, and self-shopping

- Sensitivity around key assumptions such as market coverage, awareness, conversion, repeat usage, and supply availability

- Sanity checks against grocery shopping behavior, delivery marketplace penetration, and DoorDash’s right to win in local logistics

The goal is to produce a defensible estimate and communicate the reasoning clearly, including assumptions, calculation steps, confidence level, and the main factors that could make the actual adoption number meaningfully higher or lower.