UI/UX Design Brief: What Agencies Should Provide

Why a UI/UX brief needs more than a screen list

A screen list describes output. It does not explain what users need to achieve, why the interface exists or which decisions matter most. Without that context, the design team must either pause for clarification or fill important gaps with assumptions.

A useful brief connects evidence, requirements and delivery ownership. It should be detailed enough to expose uncertainty while leaving the designer room to solve the problem rather than reproduce a predetermined layout.

1. Define the business outcome

Begin with the change the client needs the interface to support. That might be generating qualified enquiries, helping customers choose a service, reducing support requests, increasing completed applications or making a complex workflow easier to finish. Name the primary outcome and the evidence that would show improvement.

• The business problem behind the project
• The primary action users should complete
• Secondary actions and supporting journeys
• Known friction in the current experience
• Commercial, operational or compliance constraints
• How the client expects to judge success

2. Describe priority users with evidence

GOV.UK guidance recommends beginning with the people who will use a service, what they are trying to do and the problems they currently experience. Existing analytics, search data, support questions, interviews, usability findings and sales conversations can all contribute. Separate evidence from stakeholder opinion so assumptions remain visible and testable.

3. Map journeys before isolated screens

Describe where a journey begins, the decisions a user makes, the information or inputs required and what happens after completion. Include alternate routes, permissions and failure paths. This prevents the team from designing attractive individual screens that do not form a coherent experience.

• Entry point and user intent
• Important questions or decisions
• Required content, data and actions
• Success, confirmation and next step
• Empty, error, unavailable and permission states
• Dependencies on another person, system or channel

4. Define scope as patterns, pages and states

List the known pages or screens, but also identify repeated page types and interface patterns. A dashboard, search journey or form flow may contain more design work than several editorial pages because it needs data states, validation, permissions and interaction behaviour.

5. Use wireframes to resolve structure

Wireframes help the team agree hierarchy, content order and functional decisions without confusing those questions with final styling. They are most useful when the journey, page structure or stakeholder expectations remain uncertain. A clear, small website may only need representative low-fidelity layouts rather than every page wireframed.

Approval should state what has been agreed. A wireframe approval normally confirms structure and function—not final copy, visual direction or production behaviour unless the team explicitly includes those items.

6. Prototype the risky interactions

GOV.UK recommends using prototypes to explore, share and test designs before committing to production. The level of fidelity should match the question. A simple clickable flow may clarify navigation, while a realistic coded prototype may be needed to test complex interaction or behaviour across devices.

• New or unfamiliar user journeys
• Multi-step forms and conditional questions
• Navigation with several content levels
• Data-heavy tables, dashboards and filters
• Interactions that change significantly on small screens
• Assumptions that could make the complete direction invalid

7. Provide responsive requirements and real content

Responsive design is not the production of three fixed screenshots. The team needs to understand what remains important when space changes, how layouts reflow and how variable content affects the system. GOV.UK design guidance recommends designing for different screen sizes rather than assuming particular devices.

• Navigation behaviour at narrow widths
• Content and action priority when columns stack
• Long headings, labels and translated content
• Image ratios, cropping and media alternatives
• Touch targets, focus order and keyboard behaviour
• Tables, comparison layouts and complex controls

8. Make accessibility part of design responsibility

W3C guidance for interface designers includes contrast, identifiable interactive elements, consistent navigation, associated form labels, clear feedback, meaningful headings and layouts for different viewport sizes. The brief should name the expected standard and who is responsible for design checks, content decisions, implementation and final testing.

9. Set a practical review and approval process

Name the decision-maker, contributors and review stages before work begins. Your agency should consolidate client feedback, resolve contradictions and distinguish corrections from new scope. A recorded approval at each meaningful stage gives the white-label team permission to continue without hiding changes from the agency.

10. Define the Figma and development handover

Agree who owns the final files, where they will live and what development needs. A usable handover should make the approved experience understandable without requiring the developer to infer missing states or rebuild the design system from screenshots.

• Approved screens and page types with clear names
• Reusable components, properties and variants
• Responsive rules for distinctive layouts
• Interaction, form, loading, empty and error states
• Content and CMS behaviour using realistic examples
• Exportable assets and confirmed font licences
• Implementation notes and a named question owner

UI/UX design brief FAQs

What should an agency include in a UI/UX design brief?

Include the business objective, priority users, evidence, journeys, screen or page scope, content status, brand and technical constraints, accessibility expectations, decision-makers, review stages and the required handover format.

Do we need user research before UI/UX design begins?

The team needs enough evidence to understand priority users and their needs. Existing analytics, support questions, interviews, search data and previous research can all help. If important assumptions remain untested, define the research or validation needed rather than presenting them as facts.

Should wireframes be approved before visual design?

For projects with uncertain structure, content hierarchy or interactions, approving representative wireframes creates a useful checkpoint before visual production expands. A small, clearly defined website may use a lighter structure review instead.

What should a Figma handover include?

It should include approved screens, responsive intent, reusable components and variants, interaction states, content rules, assets, implementation notes and a named route for resolving questions during development.

A strong brief gives the design team useful constraints

The purpose of a UI/UX brief is not to dictate the answer. It gives the team the context, evidence, boundaries and decision process needed to solve the right problem and prepare an experience that can move into development with fewer gaps.

Oncreation provides white-label UI/UX design for UK agencies, covering journeys, information architecture, wireframes, responsive interface systems and development-ready Figma handover behind the agency relationship.