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Case Study

E-Commerce Checkout Revamp

A professional-grade Product Requirements Document (PRD) focusing on overhauling a checkout flow to reduce cart abandonment.

Document Status: ApprovedLast Updated: Oct 12, 2023

1. Metadata

Project Name

Checkout V2

Product Manager

Jane Doe

Target Release

Q3 2024

Engineering Lead

John Smith

2. Problem Statement & Objective

The Problem

Our current checkout flow requires users to create an account before completing a purchase. Analytics show a 68% drop-off rate at the registration step. Furthermore, mobile users struggle with the multi-page layout, leading to frequent timeouts and abandoned carts.

The Objective

Redesign the checkout experience to be a seamless, single-page application (SPA) that supports Guest Checkout and localized payment methods (e.g., KPay, WavePay).

3. Scope Definition

In-Scope (Phase 1)

  • Guest Checkout implementation.
  • Single-page accordion UI for Address, Shipping, and Payment.
  • Integration with Stripe (Credit Cards) and 2C2P (Local Wallets).
  • Auto-fill for shipping addresses via Google Maps API.

Out-of-Scope

  • Saved Credit Cards for guest users (requires vaulting).
  • Apple Pay / Google Pay integrations (deferred to Phase 2).
  • Multi-currency support (MMK and USD only for Phase 1).

4. Visual User Flow (SPA)

1. Cart
2. AuthGuest or Login
3. Shipping
4. Payment
5. Success

5. Functional Requirements

IDUser StoryAcceptance Criteria
REQ-01As a shopper, I want to checkout as a guest so that I don't have to remember another password.- User can proceed by providing only an email address.
- System checks if email exists; if yes, subtly prompts for login but does not block.
REQ-02As a mobile user, I want to see a numeric keypad when entering my phone number so that I can type faster.- Input type must be `tel`.
- Format validation for local formats must trigger on blur.
REQ-03As a shopper, I want to pay via KPay so that I can use my preferred local wallet.- Selecting KPay generates a dynamic QR code on desktop.
- On mobile, it triggers a deep link to the KPay app.

6. Critical Edge Cases & Error Handling

Out-of-Stock Mid-Checkout

Scenario: User stays on the payment page for 20 minutes, and the item sells out before they click "Pay".

Resolution: The backend API must perform a stock check at the exact moment of payment authorization. If out of stock, block the charge, redirect back to cart, and show an inline error message.
Stripe API Timeout

Scenario: User clicks "Pay", but the Stripe API takes longer than 15 seconds to respond.

Resolution: Display a "Processing..." loading state (disable the button). If it exceeds 15 seconds, show a timeout modal asking them to retry, but do not clear their inputted card details.

7. Analytics & Event Tracking (Mixpanel)

Event NameTrigger ConditionRequired Properties
checkout_startedUser lands on step 2 (Auth).cart_value, item_count
payment_failedAPI returns a 400/500 error during charge.error_code, payment_method
order_completedUser successfully reaches the Success page.order_id, revenue, currency

8. Success Metrics (KPIs)

  • -30%

    Cart Abandonment Rate

    Reduce the drop-off between the "Cart" page and "Order Success" page from 68% down to 38%.

  • +15%

    Mobile Conversion

    Increase the percentage of successful checkouts initiated on mobile devices by 15%.