What happens when the PRD and architecture disagree about a feature?
Resolve the product behavior first with the responsible stakeholder, then revise the technical design. Letting competing documents stand encourages developers and AI assistants to implement different expectations.
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More FAQs in How does a system-design document differ from a PRD?
Usually the system design explains the database choice and its tradeoffs. A PRD may include a technology constraint when a customer, integration, or organization requires it.
Assign the requirement an identifier, then reference it beside the responsible components, data flows, and permissions. Reviewers can follow that chain to detect missing implementation decisions.
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