How to Write a Software Project Brief That Vendors Can Actually Use

When three software vendors receive the same project request and return three completely different proposals, it is tempting to assume that someone misunderstood the project.

Sometimes they did.

But often, the bigger problem is that the project was never defined clearly enough for everyone to interpret it the same way.

A good software project brief is not a feature wishlist. It is a decision document. It gives a development team enough context to understand what needs to be built, who it is for, how it should work, what constraints matter, and what is deliberately outside the project.

The better the brief, the easier it becomes to compare proposals, identify assumptions, and avoid expensive misunderstandings later.

#What should a software project brief include?

A useful brief does not need to be dozens of pages long. It needs to answer the questions that affect the project.

Here are the areas worth covering.

#1. Who will use the software?

Start with the people involved.

Describe the main users and what they need to accomplish.

For example:

• Customers who submit enquiries
• Staff who review and assign enquiries
• Managers who need visibility into progress
• Administrators who manage settings

Do not just list user types. Explain what each group is trying to do.

This gives the development team context for the workflows that follow.

#2. What does the current process look like?

Before describing the new system, explain what happens today.

Is the process handled through spreadsheets, email, an existing application, manual data entry, or several disconnected tools?

Document the important steps.

For example:

1. An enquiry arrives through a website form.
2. Someone copies the details into a spreadsheet.
3. A team member assigns the enquiry.
4. The customer receives a manual response.
5. The team follows up through email.
6. A manager checks progress manually.

This makes the underlying problem much easier to understand than simply saying, "We need a CRM."

#3. What should the new workflow accomplish?

Now describe the desired process.

Focus on outcomes and actions rather than technical implementation.

Instead of:

Build an automated lead management platform.

Explain:

New enquiries should be captured, assigned to an appropriate team member, acknowledged, followed up, and tracked through defined stages.

The second version gives a development team something they can reason about.

#4. What integrations are required?

List systems that need to exchange information with the new software.

These could include:

• Payment systems
• CRMs
• Accounting platforms
• Email services
• Existing databases
• Internal applications
• Third-party APIs

For each integration, explain what information needs to move between systems and when.

"Integrate with our CRM" is usually not enough.

A better description might be:

When an enquiry reaches the qualified stage, the relevant customer and enquiry information should be sent to the CRM.

The exact technical approach can then be discussed with the development team.

#5. What constraints matter?

Projects rarely start with unlimited time, budget, access, or flexibility.

Document the constraints that could affect decisions.

These might include:

• Required launch date
• Existing technology
• Available team members
• Security requirements
• Regulatory requirements
• Hosting requirements
• Existing vendor contracts
• Budget boundaries
• Dependencies on other systems

Constraints help vendors understand the environment in which the project needs to work.

#6. What does success look like?

Define what needs to be true for the project to be considered successful.

This does not necessarily mean inventing a numerical ROI target.

It can be practical.

For example:

• Users can complete the main workflow without manual intervention.
• Managers can see the status of active enquiries.
• The system records the required information.
• Staff can recover from common errors.
• The agreed integrations exchange the required data.

Clear acceptance criteria make the end of the project much easier to define.

#7. What is explicitly out of scope?

This is one of the most useful sections in a project brief.

If something is not part of the first release, say so.

For example:

• Mobile application
• Advanced reporting
• Additional third-party integrations
• Multi-language support
• Custom analytics
• Automated recommendations

An exclusion does not mean the feature can never be built.

It simply prevents everyone from assuming that it is included now.

#Why this changes the proposals you receive

Imagine sending the same vague request to three vendors:

We need a platform to manage our customer enquiries. Please provide a proposal.

One vendor might assume that the project includes a customer portal.

Another might include CRM integration.

A third might assume that enquiries will continue to be managed manually after they are captured.

All three proposals could be reasonable responses to an unclear request.

The problem is that you are no longer comparing three implementations of the same project.

You are comparing three interpretations.

A stronger brief reduces that ambiguity.

#A project brief template you can copy

Copy these headings into a document and answer each prompt in plain language. A few honest sentences under each heading do more than pages of features. The same template works as a website project brief; the line marked for websites is the one to add.

1. Project: What are you building or improving, and why now?
2. Users: Each group of people who will use it, and the one thing each group needs to get done.
3. Current process: The steps as they happen today, including the spreadsheet, the inbox and the person who knows how it really works.
4. Problems: What goes wrong today: the delays, the errors, the work that falls through. Add a number only if you have measured it.
5. Desired workflow: The same steps, as they should happen afterwards.
6. Integrations: Each system the new one must talk to, what moves between them, and when.
7. Pages and content (websites): Which pages exist, which change, who writes the copy, and which addresses must keep working after launch.
8. Constraints: Launch date, budget boundaries, security or regulatory requirements, hosting, existing contracts, and who on your side can make decisions.
9. Acceptance criteria: What must be true for the first release to count as done.
10. Out of scope: What this phase will not include.
11. Open questions: What you do not know yet. Vendors should see the unknowns in the brief, not discover them in the build.

This is enough to create a much stronger starting point for conversations with software teams.

#The goal is clarity, not technical perfection

You do not need to know the right architecture before writing the brief.

You do not need to choose the database.

You do not need to specify every API endpoint.

You do not need to turn the document into a technical specification.

The brief exists to explain the business problem, users, workflows, constraints, and expected outcome clearly enough for a technical team to respond intelligently.

The technical solution can then be discussed.

#Project brief vs software requirements document

A project brief and a software requirements document answer different questions, at different times. The brief comes first. It explains the problem, the people and the outcome in the business's own words, so vendors can understand the project and propose a way to deliver it. The requirements document comes later, usually during discovery, and is written with the development team. It states what the system must do, precisely enough to build and test against.

	Project brief	Software requirements document
Answers	What problem are we solving, and for whom?	What exactly must the system do?
Written by	The business, before vendors are involved	The business and the development team together
When	Before proposals	After a team is chosen, before or alongside the build
Level of detail	Workflows, constraints, outcomes	Numbered requirements, rules, data and tests
Used for	Comparing proposals	Building, testing and agreeing what "done" means

A common mistake is writing the requirements document before anyone has asked the right questions. The result is a long feature list with confident detail in the wrong places, and vendors either price every line of it or quietly set it aside. Write the brief yourself; write the requirements together.

#What a requirements document adds to the brief

When the time comes, a software requirements document takes the brief's headings and turns each one into something that can be tested:

• Functional requirements: each thing the system must do, numbered, with the user it serves. For example: a staff member can reassign an enquiry, and the previous owner is notified.
• Roles and permissions: who can see, create, change and delete what.
• Data: the records the system keeps, their fields, where they come from and how long they are kept.
• Integration details: for each connection, what triggers it, what data moves, in which direction, and what happens when the other system is unavailable.
• Non-functional requirements: speed, availability, security, accessibility, and the browsers and devices that must work.
• Acceptance tests: for each requirement, how someone will check that it works.
• Assumptions and open questions: what was agreed without proof, and what still needs an answer.

With a good brief in hand, most of this is a matter of adding precision rather than starting again. The stage where that precision gets added is covered in what technical discovery should produce.

#Before sending your brief to vendors

Read it once as if you were seeing the project for the first time.

Ask:

• Would I understand who this is for?
• Could I describe the current process?
• Is the desired workflow clear?
• Do I know which systems need to connect?
• Are important constraints documented?
• Could I tell what success means?
• Is anything important accidentally implied rather than stated?
• Could three vendors reasonably interpret this as the same project?

If the answer to the last question is no, the brief probably needs more work.

If the brief is going to more than one vendor at once, which is normal when comparing proposals, say so, and flag anything genuinely sensitive, customer data, internal financials, unreleased plans, so each vendor knows what needs to stay confidential. Most vendors will sign an NDA before a deeper technical discussion if you ask.

A good project brief does not guarantee that every proposal will be identical.

It does something more useful.

It gives vendors a common problem to solve.

Need help turning a software requirement into a clearer project brief? Send us a project brief, even a rough one, and we can work through the scope together.