Core Technical Principles (AS and A level)

Core Technical Principles form the backbone of the WJEC A-Level Design and Technology specification. This topic covers the fundamental scientific and mathematical concepts that underpin all design and engineering activities, including materials science, forces, stresses, and manufacturing processes. Understanding these principles is essential for designing functional, safe, and efficient products, and they are assessed across both the AS and A2 examinations.

You will explore how materials behave under different conditions, the relationship between structure and properties, and how to select appropriate materials for specific applications. The topic also introduces key calculations such as stress, strain, and factor of safety, which are vital for ensuring product integrity. Mastery of these principles enables you to justify design decisions with technical reasoning, a skill highly valued by examiners.

This knowledge is not isolated; it connects directly to other areas of the specification, such as design communication, manufacturing processes, and sustainability. For example, understanding thermal properties helps you choose materials for heat-resistant components, while knowledge of forces informs structural design. By the end of this topic, you should be able to apply these principles to analyse and evaluate existing products and to inform your own design projects.