What is the difference between a product brief and a PRD?

A product brief is a lightweight product requirements document. Both answer the same questions — problem, user, success, scope — but a brief fits on one page and is meant to align a team quickly, where a full PRD adds detailed requirements and edge cases for a larger build.

What should a PRD or product brief include?

Four things at minimum: the problem and who has it, what success looks like with a measurable target, the scope (what is in and what is explicitly out), and the open questions. Detailed requirements and designs hang off that spine.

Why define what is out of scope?

The 'out of scope' list is the part that prevents scope creep. Writing down what you are deliberately not doing makes it a decision the team agreed to, rather than an omission someone fills in mid-build.

Who should sign off on a product brief?

At least engineering and design, plus whoever owns the metric you are moving. Sign-off means they have read it and agree to the problem, success definition, and scope — not that every requirement is final.

Product Brief Template — Template

TL;DR. A product brief is a one-page PRD — problem, user, success, scope. State the problem before the solution and define success up front. Copy the body of this page into a wiki page and circulate it for sign-off before anyone builds.

A product brief, also called a product requirements document, exists to align a team before the work starts. The most common failure is jumping to the solution before the problem is clear. Write the problem and the success metric first; the requirements fall out of them.

What a product brief includes

Problem. What is wrong today and who it hurts.
User. Who this is for, in one line.
Success. The metric or behaviour that says it worked, with a target.
Scope. What is in, and explicitly what is out.
Open questions. What you still need to decide.

How to use this template

Copy the body below into a new wiki page in your space.
Write the problem and who has it before any solution.
Define success with a measurable target.
Draw the scope line — list what is out, not just what is in.
Circulate for inline comments and explicit sign-off.

The template — copy from here

Summary

Author: <Name, role>
Status: <draft / in review / approved>
Date: <date>
One-line pitch: <what we are building, in a sentence>

Problem

<What is wrong today, who it hurts, and the cost of leaving it alone. Use a real example.>

Who it is for

<The user or segment. Link the persona if you have one.>

Success looks like

<The metric or behaviour that tells you this worked, with a target and a time frame.>

Scope

In:

<in-scope item>

Out (deliberately):

<out-of-scope item — the line that prevents creep>

Requirements

<Requirement, tied to the problem above.>

Open questions

<Question and who owns answering it.>

Common questions

Product brief versus PRD? A brief is a lightweight PRD — same questions, one page.

What should it include? Problem, user, success, scope, and open questions.

Why list what is out of scope? It turns scope creep into a decision the team agreed to.

Keep the brief in a wiki where the team can comment inline and the version history shows what changed in review. Pair it with the Product Roadmap Template and the User Persona Template, or see the full template library.