Design a phased migration plan for Grocery without hurting users

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 planning a phased migration for its Grocery experience. This could involve moving grocery shoppers, merchants, Dashers, order flows, catalog systems, fulfillment logic, or checkout experiences from an older setup to a newer platform or operating model. The challenge is to execute the migration without degrading the customer experience, disrupting grocery partners, reducing Dasher efficiency, or hurting marketplace reliability.

Grocery has different expectations than restaurant delivery: larger baskets, substitutions, inventory accuracy, scheduled delivery windows, cold-chain considerations, store picking workflows, and higher sensitivity to missing or delayed items. A poorly managed migration could lead to checkout failures, wrong item availability, late deliveries, merchant confusion, support volume spikes, or loss of trust among repeat grocery shoppers.

You are expected to outline how you would plan, sequence, monitor, and manage the migration as a product leader responsible for execution. Focus on how to reduce risk while still making progress, including how you would coordinate across product, engineering, operations, merchant teams, support, analytics, and local market teams.

The experience should consider:

- Which users, markets, merchants, order types, or workflows should be migrated first versus later

- Key dependencies across catalog, inventory, pricing, promotions, fulfillment, payments, support, and Dasher logistics

- How to define go/no-go criteria for each phase of the rollout

- What customer, merchant, Dasher, and operational metrics should be monitored during migration

- How to detect and respond to issues such as order failures, substitution problems, delayed deliveries, or merchant operational breakdowns

- What rollback, pause, or fallback mechanisms should exist if the migration harms users

- How communication should be handled with internal teams, merchants, Dashers, and affected customers

- How to ensure the migration supports DoorDash’s goals around delivery reliability, marketplace balance, merchant ROI, Dasher earnings, and unit economics

Your goal is to present a clear operating plan for a safe phased migration: how you would break the work into stages, assign ownership, manage launch risks, validate readiness, communicate progress, and protect the grocery shopping experience throughout the transition.