Product Requirements Document: Add Multiple Products to Cart

1. Introduction/Overview

This feature allows users to quickly add multiple products to their cart, primarily to qualify for discounts or free shipping that require a minimum order quantity. It streamlines the purchase process, especially for users buying items on sale, comparing similar products, or building product bundles. The goal is to improve the shopping experience and increase user engagement.

2. Goals

Enable users to easily add multiple products to their cart with minimal clicks.
Improve the user experience by reducing the time and effort required to add multiple items.
Increase conversion rates by making it easier for users to qualify for discounts or free shipping.
Improve engagement with the platform by making the purchasing process easier.

3. User Stories

As a customer looking for a deal, I want to be able to quickly add three products on sale to my cart so that I can qualify for free shipping.
As a customer comparing similar products, I want to add each of the three products to my cart so that I can better compare them side-by-side before deciding which one to purchase.
As a user who wants to bundle different products, I want to easily add an entire pre-configured bundle to my cart with one click.
As a customer browsing product listings, I want to be able to use a 'quick add' feature to add multiple different products to my cart with a single click.

4. Functional Requirements

The system must allow users to add pre-configured product bundles (containing at least three products) to their cart with a single click.
The system must provide a 'quick add' button or similar UI element on product listing pages. This button should allow a user to add each listed product to the cart quickly.
The 'quick add' feature must add products to the cart with the default quantity if not specified by the user beforehand.
The system must display a confirmation message upon successfully adding multiple products to the cart.
The cart icon in the header must update to reflect the increased number of items.
The system must handle cases where a product is already in the cart. If a product being added is already in the cart, its quantity should be incremented (up to a reasonable limit, e.g., 10) or the user should be notified that the product is already in the cart.
The 'quick add' feature should respect any product variant selection made by the user on the listing page (e.g., size, color).

5. Non-Goals (Out of Scope)

Integrating with social media platforms for sharing cart contents.
Providing personalized product recommendations within the 'quick add' feature.

6. Design Considerations

The 'quick add' button should be visually distinct and easily accessible on the product listing page. (Refer to mockups for button placement and styling).
Consider using a modal or slide-out cart preview to provide immediate feedback to the user after adding multiple items.
Ensure the user interface is intuitive and guides the user through the process of adding multiple products. The user should understand why the feature is being shown.

7. Technical Considerations

The implementation should be optimized for performance to avoid delays when adding multiple products to the cart.
Ensure the system can handle concurrent requests when multiple users are adding products simultaneously.
Consider using asynchronous operations to update the cart and display confirmation messages without blocking the user interface.

8. Success Metrics

Increase in average order value (AOV) by X%.
Increase in the number of users qualifying for free shipping or discounts.
Increase in user engagement (e.g., more time spent browsing) by Y%.
Reduction in the number of support tickets related to cart management.
Track the usage of the 'quick add' and bundle features. Measure the number of times these features are used per user session.

9. Open Questions

What should be the maximum quantity allowed for a single product in the cart?
Should there be a limit on the number of products that can be added using the 'quick add' feature at once?
How should we handle out-of-stock products when adding multiple items to the cart?