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Developing a successful prototype requires balancing multiple factors — client requirements, innovation, visual appeal, functionality and market viability. This lesson covers prototype development as required by AQA GCSE Design and Technology (8552), Section 3.3, and is tested on Paper 2.
A prototype is a working model of a product built to test and demonstrate the design before full-scale production. Prototypes can range from rough proof-of-concept models to fully finished pre-production samples.
| Type | Purpose | Fidelity |
|---|---|---|
| Concept prototype | Tests the basic idea or mechanism | Low — rough materials, not finished |
| Form prototype | Tests the shape, size and appearance | Medium — looks correct but may not function |
| Functional prototype | Tests whether the product works as intended | Medium–high — functions correctly but may use different materials |
| Pre-production prototype | Final check before manufacturing; made with production materials and processes | High — virtually identical to the final product |
Every design project begins with a design brief — a statement of the problem to be solved or the product to be created, usually provided by the client. The brief is developed into a design specification through research and investigation.
| Method | Description |
|---|---|
| Regular client meetings | Present ideas and prototypes at each stage; gather feedback |
| Testing against the specification | Check every specification point against the prototype |
| User testing | Let real users try the prototype and report their experience |
| Evaluation matrix | Score the prototype against each specification point (e.g. 1–5) to identify strengths and weaknesses |
| Modifications | Refine the prototype based on feedback before finalising |
AQA Exam Tip: In your NEA, photograph your prototype testing against each specification point. Create a table showing the specification point, the test method, the result and whether it passed or failed. This evidence directly earns marks.
Innovation means introducing something new or significantly improved — a new product, a new material, a new manufacturing process, a new way of solving a problem, or a new combination of existing ideas.
| Type | Description | Example |
|---|---|---|
| Product innovation | A completely new product | Apple iPod (2001) — a new category of portable music player |
| Process innovation | A new way of making something | 3D knitting footwear uppers (Nike Flyknit) — single-piece knitted shoe reduces waste by 60% |
| Incremental innovation | Small, gradual improvements to an existing product | Annual smartphone updates with faster processors and better cameras |
| Disruptive innovation | A product that fundamentally changes the market | Netflix disrupted DVD rental (Blockbuster) and later broadcast television |
| Material innovation | Using new materials | Self-healing concrete containing bacteria that produce limestone to fill cracks |
Aesthetics refers to the visual appeal of a product — how it looks and how it makes the user feel. Aesthetics includes:
| Element | Description |
|---|---|
| Form/shape | The overall 3D shape — angular, organic, geometric, flowing |
| Colour | Colour palette — monochrome, vibrant, pastel, metallic |
| Texture | Surface feel — smooth, rough, soft-touch, glossy, matt |
| Proportion | The relative sizes of different parts of the product |
| Style | The design language — minimalist, retro, industrial, luxurious |
| Finish | The surface treatment — polished, painted, anodised, powder-coated |
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