senior product spec engine

I have drafted the product specification for the "Save for Later" feature. It focuses on reducing abandonment by capturing intent earlier in the funnel.

Product Requirement Document: Save for Later

1. One-Sentence Outcome

Increase the cart conversion rate by allowing high-intent users to persist items across sessions without cluttering the active checkout flow.

2. Problem Statement

Problem: Users are using the cart as a "wishlist," adding items they aren't ready to buy yet, which skews conversion data and leads to forgotten items when they expire from the session.

• Evidence: [NEEDS DATA: % of carts abandoned with 3+ items] and user feedback regarding lost items.
• Cost of Inaction: Continued loss of high-intent shoppers who do not return once their session cookie expires.

3. Success Metrics

• Primary Metric: % increase in successful checkouts from "Saved" items within 30 days.
• Guardrail: No decrease in immediate "Add to Cart" clicks.
• Baseline: [NEEDS DATA: current checkout conversion rate]

4. User Stories & Acceptance Criteria

User Story 1: As a logged-in shopper, I want to move an item from my cart to a "Saved" list so I can clean up my current checkout view without losing the item.

• AC: Button must be visible in the cart under each line item.
• AC: Moving to saved must immediately remove the item from the subtotal.
• Priority: P0
• User Story 2: As a shopper, I want to see my saved items on the product page so I can quickly add them back.
  • AC: Display a "Saved Items" counter in the header.
  • Priority: P1

5. Experiment Design

Hypothesis: If we add a "Save for Later" option, then cart abandonment will decrease by [NEEDS DATA: Target %] because users will distinguish between "buying now" and "considering."

• Decision Rule: Ship if the checkout conversion rate sees a statistically significant lift without hurting AOV.

6. Risks & Open Questions

1. Risk: Users might use this to defer purchases indefinitely (High severity, Medium likelihood).
2. Question: Should we trigger an automated email when a "Saved" item goes on sale?
3. Question: What is the current technical limit for persisted items in the database?

Next steps

1. Provide the current baseline cart abandonment rate to replace placeholders.
2. Review the P0 user stories with the engineering lead for a T-shirt estimate.
3. Confirm if the "Saved" list should persist across different devices.