Core Design and Making Principles (A level only) — WJEC A-Level Design and Technology

Core Design and Making Principles (A level only) in WJEC A-Level Design and Technology covers the fundamental design process, materials, manufacturing techniques, and evaluation methods. It emphasises user-centred design, sustainability, and the application of technical knowledge to solve real-world problems, preparing students for the NEA and written exams.

Core Design and Making Principles is a foundational component of the WJEC A-Level Design and Technology course. It encompasses the entire design process, from identifying user needs and writing specifications, through to material selection, manufacturing techniques, and final evaluation. This topic is not just about theory; it is about applying knowledge to practical design scenarios, which is essential for both the written examination and the non-examined assessment (NEA).

The principles cover a wide range of areas, including design communication (e.g., sketching, CAD), material properties (e.g., metals, polymers, woods), manufacturing processes (e.g., casting, injection moulding, CNC machining), and quality control. Sustainability and the impact of design on society and the environment are also key themes, reflecting modern industry practices. Understanding these principles allows students to make informed design decisions and justify their choices with technical reasoning.

This topic is the backbone of the subject, linking together creative design with practical making. It prepares students for higher education or careers in engineering, product design, and manufacturing. Mastery of these principles enables students to approach design problems systematically, ensuring that their solutions are not only aesthetically pleasing but also functional, safe, and commercially viable.

• →User-centred design: designing products that meet the needs, wants, and limitations of the end user, involving research, personas, and usability testing.
• →Material properties: understanding physical and mechanical properties such as strength, hardness, ductility, and thermal conductivity, and how they influence material selection.
• →Manufacturing processes: knowledge of a range of processes including additive (3D printing), subtractive (milling), and forming (injection moulding), and their suitability for different materials and scales of production.
• →Quality control: using tolerances, jigs, and fixtures to ensure consistency and accuracy in production, and the role of inspection and testing.
• →Sustainability: considering the environmental impact of design choices, including material sourcing, energy use, waste reduction, and end-of-life disposal or recycling.

• Application of user-centred design, circular economy, and systems thinking
• Use of project management approaches like critical path analysis, scrum, or six sigma
• Planning for accuracy, efficiency, and scalability in manufacturing
• Consideration of environmental factors, waste disposal, sustainability, and energy conservation
• Application of relevant standards (BSI, ISO) and health and safety legislation
• Understanding of the product life cycle stages: introduction, growth, maturity, decline, and obsolescence

• 💡Ensure design decisions are justified through the lens of the circular economy and systems thinking
• 💡Demonstrate an understanding of how to scale a prototype for mass production
• 💡Explicitly reference BSI/ISO standards and health and safety regulations in design justifications
• 💡Clearly articulate the impact of design choices on the product life cycle and environmental sustainability
• 💡Always use correct technical terminology in your answers, such as 'tolerance', 'jig', 'fixture', 'ergonomics', and 'life cycle assessment'. This demonstrates depth of knowledge and earns marks.
• 💡When answering evaluation questions, use a balanced approach: discuss both strengths and weaknesses, and always justify your points with evidence or reasoning. Avoid making unsupported claims.
• 💡In the NEA, ensure that your design decisions are clearly linked to your research and specification. Examiners look for a clear rationale behind every choice you make.

• Failure to apply advanced project management techniques to the design process
• Neglecting the relationship between material, form, manufacturing processes, and scale of production
• Lack of consideration for the full product life cycle including end-of-life disposal
• Superficial application of standards and legislative requirements
• Misconception: 'Harder materials are always better.' Correction: Hardness is just one property; a material may be hard but brittle, like glass, which is unsuitable for impact-resistant products. Selection depends on the specific requirements of the product.
• Misconception: 'CAD is only for drawing.' Correction: CAD is used for 3D modelling, simulation, and generating instructions for CAM, and it allows for rapid prototyping and testing.
• Misconception: 'Tolerance means the same as accuracy.' Correction: Accuracy is how close a measurement is to the true value, while tolerance is the allowable deviation. A part can be accurate but have a tight tolerance, or vice versa.

1. 1Week 1: Focus on the design process and user-centred design. Review the stages of design, from brief to evaluation, and practice writing specifications. Create flashcards for key terms.
2. 2Week 2: Dive into materials and their properties. Make a comparison table of common materials (woods, metals, polymers) and their uses. Test yourself on properties and applications.
3. 3Week 3: Study manufacturing processes. Watch videos of processes like injection moulding and CNC machining. Create a mind map linking processes to materials and scale of production.
4. 4Week 4: Consolidate with past paper questions. Practice calculation questions and 6-mark evaluation questions. Review mark schemes to understand what examiners look for.
5. 5Week 5: Focus on sustainability and quality control. Research case studies of sustainable design. Practice answering questions on life cycle assessment and tolerances.

• 📋Multiple-choice questions: These test recall of key facts, such as material properties or definitions. Read carefully and eliminate obviously wrong answers.
• 📋Short-answer questions: These require concise explanations, e.g., 'Explain why a polymer is suitable for a product.' Use correct terminology and give a reason.
• 📋Calculation questions: These involve working out area, volume, mass, or cost. Show all working and include units in your final answer.
• 📋Extended response questions (6-8 marks): These often ask you to evaluate a design decision or compare materials. Structure your answer with an introduction, points for and against, and a justified conclusion.