What Makes a Good Brief for a Developer? (UK Business Guide)

The quality of a developer brief is the single strongest predictor of whether a project goes well. A clear, specific brief produces an accurate quote, a smooth build, and a result that matches what you needed. A vague brief produces scope creep, cost overruns, and a product that is close to what you wanted but not quite right.

Start with the problem, not the solution

The most common mistake in developer briefs is describing a solution rather than a problem. "We need a portal where clients can log in and see their invoices" describes a solution. "Our clients currently call or email us to get invoice copies, which takes our team 20 minutes per request and we receive 50 requests per month" describes the problem. The developer who understands the problem can often propose a better solution than the one you had in mind. Start with what is broken or slow or manual, then explain what outcome you want.

Be specific about who will use it

Describe every type of user who will interact with the system. For each user type: what they need to be able to do, how often they will use it, what level of technical confidence they have, and what device they will primarily use it on. A system used by one technically confident internal administrator is built very differently to one used by 500 external customers on mobile devices. This information fundamentally shapes the design, the functionality, and the cost.

List every integration requirement upfront

Every system the new tool needs to connect to should be in the brief from the start. What accounting software do you use? What CRM? What email platform? Does it need to connect to your website? Any integration requirement that emerges after the build starts adds cost and time. If you are not sure whether a connection is needed, include it in the brief as a question rather than leaving it out.

Separate must-haves from nice-to-haves

Every feature in the brief should be tagged as either essential — the system cannot work without it — or desirable — it would add value but the system works without it. This allows the developer to give you a core quote for the essential scope and an addendum quote for the desirable features. It gives you control over the total cost and allows you to prioritise if budget is constrained.

Include examples of what good looks like

If there are existing tools, websites, or systems that have features you want to replicate or be inspired by, include them. Screenshots, URLs, or even rough sketches communicate design intent far more effectively than written descriptions. "Something like this but for our specific process" with a reference gives the developer a visual anchor that written descriptions cannot provide.