Design an MVP to solve remembering essentials before they run out and handling substitutions in a Zepto-style product under scale, incentive, and regulatory constraints

Problem Statement Description

Product context: Zepto is an Indian quick-commerce company; its products include rapid grocery delivery, fresh produce, everyday essentials, local inventory, and dark-store operations.

Zepto serves customers who rely on quick commerce for high-frequency household essentials such as milk, eggs, bread, diapers, toiletries, medicines-adjacent items, pet food, and snacks. In busy households, remembering what is about to run out is often fragmented across family members, routines, and last-minute moments. Customers may open the app only after an item is already unavailable at home, leading to rushed orders, forgotten items, or incomplete baskets.

The second part of the problem is substitution handling. In a fast-moving dark-store environment, an item that looked available during browsing may become unavailable by the time of picking, or the exact size, brand, flavor, freshness level, or regulated category variant may not be feasible to fulfill. Poor substitution experiences can reduce trust, increase refunds and support contacts, create picker confusion, and add operational cost.

Design an MVP for a Zepto-style quick-commerce product that helps busy households remember essentials before they run out and handles substitutions in a way that improves basket completion without harming customer trust, store operations, or compliance. Assume the product operates across multiple cities, dark stores, item categories, and customer segments, with constraints around inventory accuracy, picker incentives, privacy, accessibility, cost, and applicable product regulations.

The experience should consider:

- The core user workflow from recognizing a household need, adding or confirming essentials, checkout, fulfillment, and post-delivery feedback.

- How the MVP identifies or supports likely replenishment needs while avoiding intrusive, creepy, or inaccurate reminders.

- How customers express substitution preferences before or during checkout, including brand, price, size, dietary, freshness, and “do not substitute” constraints.

- How pickers and store operations receive clear, low-friction instructions without creating excessive decision burden or per-order delays.

- How to handle sensitive or regulated categories where substitutions, recommendations, or reminders may require stricter controls.

- How the experience works when inventory signals are uncertain, fast-changing, or different across dark stores.

- How incentives are aligned so customers, pickers, and the business are not pushed toward low-trust or low-quality substitutions.

- How the MVP remains accessible, privacy-conscious, and scalable across varied household types, languages, and shopping patterns.

Your goal is to define the MVP scope, target users, key user journeys, product surfaces, and success boundaries for this product design problem. Focus on the customer and operational experience the product must support, the trade-offs that make the MVP viable at quick-commerce scale, and how the design would create trust while improving basket completion.