What needs to be covered in a design brief?
1. Project Definition
- Scope & Purpose
- Concise problem statement (e.g., "Design ergonomic garden tools for arthritis
patients")
- Clear boundaries of what's included/excluded
- Background Rationale
- Market gap analysis
- User pain points identified through research
2. Core Objectives
- Primary Goals
- Functional: "Reduce required grip strength by 40%"
- User experience: "Achieve 90% comfort rating in trials"
- Success Metrics
- Quantifiable targets with measurement methods
- Example: "15% faster task completion in timed tests"
3. Target Users
- Detailed Personas
- Demographics: Age 65+, limited hand mobility
- Behavioural patterns: Weekly gardening habits
- Inclusive Considerations
- Accessibility requirements
- Cultural/regional usage factors
4. Budget & Resources
- Financial Plan
- Total budget: £XX,XXX breakdown
- Prototyping: 40% | Testing: 25% | Production: 35%
- Resource Allocation
- Materials sourcing strategy
- Specialist consultancy requirements
5. Timeline & Deliverables
- Phased Schedule
- Research phase: 4 weeks (incl. user interviews)
- Prototype development: 6 weeks (3 iterations)
- User testing: 3 weeks (50 participants)
- Tangible Outputs
- Phase 1: User research report + CAD concepts
- Phase 2: 3D printed prototypes + testing data
How to write a design and manufacturing specification
1. Technical Product Specification
- Dimensional Requirements
- Critical measurements with tolerances (e.g., "Grip diameter: 35mm ±0.5mm")
- Weight restrictions and balance points
- Material Specifications
- Precise material grades (e.g., "Polypropylene, 30% glass-filled")
- Surface finish requirements (texture, roughness values)
2. Production Requirements
- Manufacturing Processes
- Specific methods (e.g., "Injection moulding - 2 cavity tool")
- Cycle time targets and output rates
- Assembly Instructions
- Step-by-step assembly sequence
- Fastening torque values where applicable
3. Quality Control Standards
- Testing Protocols
- Performance tests (e.g., "5000 cycle durability test")
- Safety certifications required (BS/EN standards)
- Inspection Criteria
- Visual inspection standards
- Sampling frequency for dimensional checks
4. Compliance Documentation
- Regulatory Requirements
- UKCA/CE marking specifications
- Product safety directives
- Sustainability Targets
- Recyclability percentages
- Carbon footprint reduction goals
Key Connections Between Brief and Specification
- User requirements from brief directly inform technical specifications
- Budget constraints determine material and process selections
- Timeline impacts tooling complexity and production planning
Topic test:
Interactive flashcards: