How to Write a Great Product Requirements Document (PRD)

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Damien Filiatrault
Founder & CEO
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Any aspiring Product Owner looking to build a great software product could be forgiven for feeling overwhelmed. A quick Google search turns up a lot of conflicting, dated examples for Product Requirements Documents (PRD). That’s because people used to follow the Waterfall methodology and define everything their software would do at the outset (think bloated Use Cases and UML diagrams).

We don’t want to waste precious time trying to define every possible thing your software will do and, quite frankly, no one likes writing (or reading) a verbose PRD.

In this article, we’ll share how to write an effective PRD that will help you speed up development and ensure you ship the right features to your users. Referencing our easy-to-implement PRD approach, we’ll go over how to define goals, understand the user journey, and map out detailed requirements. We’ll also explain how PRDs can help facilitate getting a reasonably accurate estimate for your project.

Product Requirements Document Template

By making a copy of our PRD template, you can see a completed example and create your own PRD as you follow along. And if you’re interested in calculating a rough cost breakdown for your project, check out our estimation template as well.

Table Of Contents

Why do Agile Teams Need a Product Requirements Document?

Today, savvy project managers have shifted to the new, agile side of the spectrum where the product is released quickly, feedback is obtained and improvements are made iteratively. While I am a big believer in agile and Scrum, it is not sensible to just hire a development team and start building features without knowing what you are getting into.

On the whole, I believe that agile is a better methodology than Waterfall, but I think in many cases we have swung too far to the “agile” side of the pendulum and still will benefit from a micro-dose of planning before we just dive in and start developing.

When determining requirements, we want to strike the right balance between being prepared and being agile. In other words, the bare minimum effort that is needed to start building a great product.

Originally published on Apr 5, 2020Last updated on Jan 4, 2024

Key Takeaways

What is a Product Requirements Document?

A Product Requirements Document is a document that outlines the purpose, use cases, and functionality of an intended product at a high level. It’s the starting point for planning and designing a piece of software to be completed before the developers get started.

What’s the purpose of a Product Requirements Document?

The purpose of a Product Requirements Document is to outline the general shape and objectives of a project to make sure everyone is on the same page once things get started. Ultimately, it’s about providing a clear direction to help teams get moving quickly and in the right direction.

Why should you use a Product Requirements Document?

You should use a Product Requirements Document for your project as it allows you to maintain control over your project, and ensure that everyone is on the same page with what’s being built. A PRD acts as an anchor for expectations and direction to share with and unify the team.

What is a good PRD?

A good PRD communicates the overall vision of a product and outlines how end-users will use it. It answers important questions like what’s the product, what is its purpose and the problems it solves, who will use it, and if they're other similar products that exist on the market. PDRs bring clarity and help answer important questions right off the bat. The document acts as the starting point for your product and is an essential precursor to design and development.

Who writes the PRD?

Typically, a product manager will write a PRD. But, if it's a new company, usually a founder will map out their product ideas and communicate issues it plans to solve for the end-user. This PRD will be given to the developers and designers so they can start mapping out how it will technically work.

What should be in a PRD document?

Your PRD should define your goals, describe your ideal users, answer short user stories on how they’d use the product, and include the design of individual screens to show how users would journey through your product. For bonus points, map out different user touch points like emails and list our functional and non-functional requirements.