A product requirements document, or PRD, tells everyone building a feature what problem it solves, for whom, and how you’ll know it worked. Many PRDs fail at the one thing they exist for: being read. They grow to twenty pages, mix decisions with brainstorms, and go stale within a fortnight. Developers skim them, designers ignore them, and the real requirements end up scattered across chat threads.
A short, clear PRD fixes that. Here is a template, rules for writing each section, and a few habits that keep the document useful after week one.
What a PRD is for
A PRD answers the questions a developer, designer or tester would otherwise ask you one by one:
- Why are we building this, and why now?
- Who is it for?
- What must it do, and what is deliberately left out?
- How will we know it worked?
It is not a technical design, a project plan or a pitch deck. Technical decisions belong in a separate design note the developers write. Timelines belong in your project tracker. Keep the PRD focused on the problem and the expected behaviour.
A one-page product requirements document template
Copy this structure. For most features, each section should be a few lines.
- Title, owner and status. Who decides, and whether this is draft, agreed or shipped.
- Problem. Two or three sentences describing what is going wrong today, with evidence: support tickets, interview notes, data.
- Users. Which user type is affected. Be specific: “first-time customers booking on Android,” not “users.”
- Goal and success measure. One or two numbers that should move, with a target and a date.
- Requirements. A numbered list of what the product must do, each written as a testable statement.
- Out of scope. What this feature will not do, even though someone might expect it.
- Designs. A link to the mock-ups, with any notes the designs alone can’t show.
- Open questions. Things still undecided, each with an owner and a date.
- Change log. Date and summary of every change after the PRD is agreed.
How to write requirements people can test
A requirement is useful when a tester can say “yes, it does this” or “no, it doesn’t”. Compare these:
- Vague: “Booking should be fast and easy.”
- Testable: “A returning customer can book a repeat service from the home screen in three taps or fewer.”
- Vague: “Handle payment failures gracefully.”
- Testable: “If a UPI payment fails, the booking stays reserved for 10 minutes and the customer sees a retry button and a message explaining what happened.”
Some rules that help:
- Write from the user’s side: “The customer can…” or “The provider sees…”.
- Number every requirement so people can refer to “R7” in a review.
- Cover failure and empty states, not only the happy path.
- Add acceptance criteria under complex requirements using a Given / When / Then format: “Given a provider has no free slots, when a customer opens their profile, then the next available date is shown.”
- Mark priority. “Must” for launch, “should” if time allows, “later” for the next version.
What to leave out
A PRD becomes unreadable when it tries to hold everything. Move these elsewhere:
- Background research. Link to it; summarise only the conclusion in the problem section.
- Alternatives you considered and rejected. A short note in open questions or a separate decision record is enough.
- Implementation detail, like database tables or API names. Leave that to the technical design.
- Long user personas. One line on who the user is usually does the job.
An example, in brief
Say a Bengaluru home services app is seeing customers book a cleaner and then cancel when the provider is late. A PRD for a “provider on the way” feature might read:
- Problem: customers cancel bookings when providers run late because they don’t know when the provider will arrive. Support logs show late arrival as a frequent reason for cancellation calls.
- Users: customers with a booking in the next two hours.
- Goal: reduce cancellations caused by lateness within six weeks of launch.
- R1: when the provider taps “Start trip”, the customer gets a push notification and an SMS.
- R2: the booking screen shows the provider’s name, photo and an estimated arrival time.
- R3: if the provider has not started the trip 30 minutes before the slot, the operations team is alerted.
- Out of scope: live map tracking of the provider (planned for a later version).
That fits on one screen, and a developer, designer and tester can each start work from it.
Keeping the product requirements document alive
A PRD that is right on day one and wrong on day twenty does more harm than none. A few habits help:
- Keep one copy, in one place, linked from the task tracker. No attachments in email.
- When a decision changes in a meeting or chat, update the PRD the same day and add a line to its change log.
- Walk through it with the team before building starts. Ten minutes of questions saves days of rework.
- After launch, add the actual result next to the goal. That builds a record of what worked.
Clear written requirements are the base of how we run projects: a written scope agreed before work starts, with progress shown every week. If your team needs help setting up product documentation, our technology advice and part-time CTO service can help, or we can write the PRD as part of an app or SaaS build. Drop us a line if you’d like to talk it over.
Frequently asked questions
How long should a product requirements document be?
As short as possible while still answering what, why, for whom and how you’ll measure it. For a single feature, one to two pages is common. For a whole first product, write a short overview PRD and a separate one-page PRD per major feature, rather than one long document nobody finishes.
Who should write the PRD?
The person accountable for the product decision, usually the founder or product manager. They should draft it with input from design and engineering, since developers often spot missing edge cases and designers catch confusing flows. One named owner keeps it consistent and decides when changes are accepted.
Is a PRD still needed in agile teams?
Yes, in a lighter form. Agile teams still need a shared statement of the problem, the users, the goal and what is in or out of scope. User stories and tickets then break the PRD into work. Without it, each ticket carries its own assumptions and the feature drifts.