How to Write a Product Requirements Document (PRD)

A Product Requirements Document (PRD) describes what you are building, for whom, and why — at a level engineers and designers can implement without constant guesswork. It is not a technical specification, but it should be specific enough that success criteria are testable.

Open with context: problem statement, target users, business goals, and constraints (timeline, budget, platforms). Stakeholders should recognize their priorities in this section — it anchors trade-off discussions later.

Define scope explicitly. List in-scope capabilities and, equally important, out-of-scope items for the current release. Founders underestimate how valuable an "not in v1" section is for preventing scope creep.

Describe user flows and scenarios rather than only feature bullets. "User can reset password" is a start; a flow covers email entry, token expiry, error states, and mobile behavior. Wireframes or links to prototypes strengthen PRDs significantly.

For each major requirement, include acceptance criteria — conditions that must be true for the feature to be considered complete. Acceptance criteria become the basis for QA and reduce disagreements at demo time.

Capture non-functional requirements: performance expectations, accessibility, supported browsers or devices, security and compliance needs, analytics events, and localization if relevant. These items often arrive late if omitted from the PRD.

Keep the PRD alive. Update it when decisions change, link it to your roadmap, and version significant shifts. Nexory helps teams draft and refine PRDs during discovery so development starts with shared clarity.