How to Write a Software Development Brief That Gets Accurate Quotes

The single biggest factor determining whether a software development project comes in on time and on budget is the quality of the initial brief. A well-written brief saves weeks of back-and-forth, produces more accurate quotes, and significantly reduces the risk of scope creep. Yet most businesses approach development companies with vague descriptions and wonder why every quote is different.

What a Good Brief Contains

A development brief does not need to be a hundred-page specification. It needs to clearly communicate the following seven elements:

1. Business context — what your company does, who your customers are, and what problem you are trying to solve
2. Project objectives — what specific, measurable outcomes you expect from the software
3. User types — who will use the system and what their primary tasks are
4. Feature requirements — what the system needs to do, prioritised by importance
5. Integration requirements — what existing systems the software needs to connect with
6. Constraints — budget range, timeline, compliance requirements, technology preferences
7. Success criteria — how you will measure whether the project was successful

How to Describe Features Effectively

The most useful format for describing features is user stories: 'As a [user type], I need to [do something] so that [business outcome].' This format forces you to think about who benefits and why, rather than just listing technical requirements. Group features into three tiers:

• Must Have — the project fails without these; include in MVP scope
• Should Have — important but can be delivered in a second phase
• Nice to Have — would be valuable but are not essential; include in future roadmap

What to Include About Budget and Timeline

Many businesses hesitate to share their budget, fearing they will be quoted the maximum. In practice, withholding your budget leads to wildly different quotes because each vendor guesses at a different scope level. Sharing a budget range (e.g., 'Our budget is 20,000 to 35,000 euros') allows vendors to propose realistic scope within your means and makes proposals directly comparable.

For timelines, distinguish between hard deadlines (regulatory, contractual) and preferred dates. If your deadline is driven by a business event (product launch, trade show), say so — this helps the vendor plan resources effectively.

Common Brief Mistakes and How to Avoid Them

• Too vague — 'We need a modern website' tells the vendor nothing; specify your goals and audience
• Too prescriptive — dictating specific technologies without understanding trade-offs limits your options
• No priorities — listing 50 features as equally important makes everything high priority, which means nothing is
• Missing integrations — forgetting to mention that the system needs to connect to your ERP or payment processor adds cost later
• No success criteria — if you cannot define what 'done' looks like, neither can the vendor

How to Compare Quotes Effectively

When comparing proposals from multiple vendors, do not simply choose the lowest price. Compare the scope each vendor has included, the assumptions they have made, the technologies proposed, the team composition, and the warranty or support terms. A quote that is 30 percent cheaper but covers 50 percent of the scope is not a better deal.

At OBI Systems, we provide detailed proposals that break down every feature with estimated hours and cost — so you can see exactly what you are getting and make informed trade-offs. If you are preparing a brief and want a second opinion before sending it to vendors, we are happy to review it free of charge.