A Requirement Document Any Developer Can Build From
BRD and PRD preparation turns what you already know you want built into a written requirement - business case, scope, user roles, screens and exclusions - so vendors quote the same thing and a developer can build from it directly.
What BRD and PRD Preparation Covers
This is for someone who already knows, roughly, what they want built and has possibly already chosen who will build it - what is missing is the document that turns that knowledge into something a developer can act on. A Business Requirement Document states the objective, the business case and what is in and out of scope in language your management can approve. A Product Requirement Document goes further - the screens, user roles, data fields, rules and what is deliberately left out - at the level of detail a developer can be held to.
Why a Verbal Brief Is Not Enough
Every Person in the Room Remembers a Different Meeting
A requirement that only exists as meeting notes and a WhatsApp thread means each stakeholder walks away with a slightly different version of what was agreed, and the gap surfaces later as a paid change request.
A Developer Fills Gaps With Guesses
Where the brief is silent - what happens on a return, who can see what, what the error state looks like - a developer either asks constantly or, worse, decides for you and builds something you did not intend.
Multiple Vendors Cannot Quote the Same Thing
Without a written scope, three quotations for the same idea end up describing three different pieces of work, and comparing their prices tells you nothing useful.
What Goes Into the Document
- The business objective and how success will be judged
- User roles, permissions and what each role can see and do
- Screens and states, including empty, error and edge cases
- Data fields, validation rules and where data comes from or goes to
- What is explicitly out of scope, so nobody assumes it is included
What Drives Cost and Duration for BRD and PRD Work
How much of the requirement already exists in some form - a rough spec, screenshots of a competitor, notes from past meetings - versus needing to be drawn out through fresh interviews with each stakeholder. The number of user roles and distinct screens also matters, since each one needs its states and rules written out individually, and a requirement touching a regulated process takes longer because the rules have to be checked, not assumed.
What You Hold When the Documents Are Delivered
A Document You Own Outright
The BRD and PRD belong to you, written to be handed to any vendor of your choosing, including one other than us.
A Basis for Comparable Quotes
A scope specific enough that different vendors pricing the same document can finally be compared on the same basis.
A Reference You Can Hold a Vendor To
A document detailed enough that scope disagreements during the build can be settled by reading it rather than by memory or opinion.
Frequently asked questions
Do I need both a BRD and a PRD, or just one?
Depends on your audience. If you only need to get management or investors to approve a business case, a BRD alone is enough. If a developer is going to build from the document, you need the PRD as well - the BRD explains why, the PRD explains exactly what.
I already have a rough spec - can you just tighten it up?
Yes, and it is usually faster than starting from nothing. We work from whatever exists - notes, screenshots, an old proposal - and fill the gaps through targeted questions rather than a full discovery from scratch.
Will this include the technical architecture as well?
Not by default. This engagement documents what should be built and how it should behave, not how it should be technically structured underneath. Architecture is a separate piece of work once the requirement is settled.
What drives the cost of writing these documents?
The number of user roles and screens, how much of the requirement already exists versus needing fresh interviews, and whether a regulated process is involved, since those rules have to be checked rather than assumed.
What decides how long it takes to write?
How quickly stakeholders can be reached to confirm details, and how many rounds of review your side needs before signing off each section. A requirement with one clear owner moves faster than one several departments have to agree on.
Can I take the finished document to a different developer?
Yes. The document is written vendor-neutral, at a level of detail any competent developer can quote and build from - it does not assume GullySystem will be the one building it.
What do you need from me to get started?
Whatever you already have, however rough - notes, sketches, a competitor's app you like, a half-written spec - plus access to the people who will use the final product, since their edge cases are what the document actually needs to capture.
Tell us what you need.
Send a short brief and one of our engineers will come back to you — usually the same day.
- No obligation
- We reply the same working day
- Your details stay private