How to write a PRD: The way I’d actually do it
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Once scope is clear, I make ownership explicit with a lightweight RACI for product managers so decisions do not stall between product, design, engineering, and support.
A PRD (product requirements document) should make building the right thing easier. If it only exists to survive a committee, it's already failing.
(Note: some older guides blur "PRD" and "roadmap." They're related, not the same. Roadmaps communicate intent over time; PRDs specify a problem/solution slice deeply enough to execute.)
What a PRD is
A shared artifact describing problem, users, goals, requirements, constraints, and success criteria for a product change—so design and eng can make good decisions without telepathy.
Components I'd include
- Primary purpose / problem statement — who hurts, what's broken, why now
- Goals & non-goals — protect scope
- Users & scenarios — personas lightly; jobs and flows heavily
- Requirements — functional + non-functional (perf, security, accessibility)
- Design guidance — principles and references, not pixel dictatorship (unless needed)
- System & environment notes — platforms, integrations, migration needs
- Analytics — events needed to learn
- Rollout / timeline intent — phases, feature flags, risks
- Open questions — honesty > fake certainty
Who writes it? Usually the PM, with design/eng co-authors. Ownership can vary; clarity can't.
How I'd write one (phases)
Phase 1: research
Talk to users, read tickets, check data, review constraints with eng early.
Phase 2: purpose & characteristics
One-paragraph problem; success metrics; explicit non-goals.
Phase 3: user profile & critical journeys
Happy path + failure path. Include edge cases that explode support.
Phase 4: technical requirements
APIs, data, permissions, backwards compatibility. Invite an eng lead to pressure-test feasibility.
Phase 5: testing, support, compliance
QA scope, feature flag plan, support macros, legal/privacy if relevant.
Then: write short. Socialize. Decide. Update as you learn—version it.
My take
The best PRD is the thinnest document that prevents expensive misunderstanding. If eng still needs a meeting for every sentence, add examples and acceptance criteria—not adjectives.
I also keep a focused product requirements document guide for PMs to connect the problem, scope, requirements, and decision rules before build work begins.
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