What Belongs in a Product Requirements Document and Why Each Section Matters

As a product manager, what are the main components of a product requirements document (PRD)? Name the sections you would include, explain what each one should contain, and say why it deserves a place in the document. ```hint Think about the readers A PRD is read by engineers, designers, data scientists, legal reviewers and leaders, and each of them opens it looking for different answers. Work out what each reader needs to find. ``` ### Clarifying Questions - Is the PRD for a brand-new product or for a feature inside an existing product? - Who is the main audience: the engineering and design team building it, or leadership approving the investment? - Does the team treat the PRD as a living document updated during development, or as a spec signed off before work begins? - How large is the effort: a small iteration one squad can ship, or a launch that spans several teams? ### What a Strong Answer Covers - The problem side: who the users are, the problem, the evidence for it, and the goal. - The solution side: prioritized requirements, explicit scope boundaries, and the intended user experience. - How success will be measured, and how risks, dependencies and unresolved questions are tracked. - The purpose of each section (which reader it serves, which failure it prevents) rather than a bare list of headings. - Fitting the document's depth to the size of the effort and keeping it current after kickoff. ### Follow-up Questions - An engineer says your PRD is too prescriptive about the solution. How do you decide what belongs in the PRD versus a technical design or a design spec? - How would a PRD for a small improvement to an existing flow differ from one for a new product line? - Requirements change halfway through development. How do you update the PRD so the team keeps trusting it?