What are the five forces and stresses in AQA GCSE Design and Technology?

The five forces and stresses are tension (pulling apart), compression (squashing), bending, torsion (twisting) and shear (forces acting across the material so layers slide). Products are reinforced and stiffened against these using techniques such as lamination, ribs and webbing, folding, triangulation and adding fibres.

What are the four families of manufacturing process?

Processes for working with materials fall into four families: wastage (cutting material away, such as sawing or drilling), addition (joining material, such as gluing or welding), deforming (changing shape while solid, such as bending or vacuum forming) and reforming (changing the material's state, usually by melting and casting it in a mould).

What are the scales of production in AQA GCSE Design and Technology?

The scales of production are one-off (a single bespoke item), batch (a set number made together), mass (large numbers on a production line) and continuous (non-stop production, 24 hours a day). The scale chosen depends on demand and cost, with one-off having the highest cost per item and mass and continuous the lowest.

How should I revise Specialist technical principles for AQA GCSE Design and Technology?

Work through each numbered section (3.2.1 to 3.2.7), learning the factors that influence material selection, the five forces and reinforcing techniques, the 6 Rs and finite versus non-finite resources, the four process families and scales of production, and the finishes that suit each material. Practise justifying choices and applying them to real products, then attempt AQA past papers.

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AQA GCSE Design and Technology 3.2 Specialist technical principles: a complete overview

Q: What does AQA GCSE Design and Technology 3.2 Specialist technical principles cover?

Specialist technical principles covers deeper, more applied knowledge of materials and making: selecting materials and components, the forces and stresses acting on objects and how to resist them, the ecological and social footprint of products, the sources and origins of materials, techniques for working with materials, stock forms and scales of production, and surface treatments and finishes.

A deep-dive AQA GCSE Design and Technology guide to 3.2 Specialist technical principles. Covers the selection of materials, forces and stresses, the ecological and social footprint, the sources and origins of materials, working with materials, stock forms and manufacturing, and finishes, with the exam patterns AQA repeats.

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Jump to a section

What 3.2 Specialist technical principles covers
Recurring themes
How to study Specialist technical principles
The seven parts, dot point by dot point
For the official specification

AQA GCSE Design and Technology (specification 8552) builds on the core principles with 3.2 Specialist technical principles, deeper applied knowledge about materials and making. This guide maps the seven parts of the section and how to revise each.

What 3.2 Specialist technical principles covers

This section asks you to apply knowledge to choose, work and finish materials. The seven parts are:

3.2.1 Selection of materials and components: Choosing materials by function, aesthetics, environment, availability, cost, and social, cultural and ethical factors.
3.2.2 Forces and stresses: Tension, compression, bending, torsion and shear, and how to reinforce and stiffen materials with lamination, ribs, folding, triangulation and fibres.
3.2.3 Ecological and social footprint: The 6 Rs, finite and non-finite resources, and the environmental and social impact of manufacturing and disposal.
3.2.4 Sources and origins of materials: Growing and seasoning timber, extracting and refining metals, and making polymers from crude oil.
3.2.5 Working with materials: Wastage, addition, deforming and reforming, and using tools to cut, shape, form and join safely and accurately.
3.2.6 Stock forms and manufacturing: Standard stock forms and sizes, standard components, and scales of production from one-off to continuous.
3.2.7 Surface treatments and finishes: Finishes for timbers, metals and polymers, applied for protection and appearance.

Recurring themes

Justified choices. Marks reward explaining why a material, process or finish is suitable, not just naming it.
Sustainability. The 6 Rs and finite versus non-finite resources reappear across selection, sourcing and disposal.
Match to material. Finishes and processes must suit the material, for example galvanising steel or varnishing timber.

How to study Specialist technical principles

Apply, do not just list. Link properties, forces, processes and finishes to specific products and needs.
Learn the frameworks. The five forces, four process families and scales of production are reliable marks.
Practise sustainability answers. The 6 Rs and resource types support many extended questions.
Match finish to material. Know which finishes suit timber, metal and polymer and why.
Attempt past papers. Drill AQA 8552 questions under timed conditions.

The seven parts, dot point by dot point

Each part has a specification-statement-level answer page with worked exam questions and cross-links, plus this overview and a quiz. Browse the full set at /gcse-aqa/design-and-technology/syllabus.

For the official specification

AQA publishes the full specification (8552), past papers and mark schemes at aqa.org.uk. Always revise from the current specification and AQA's own past papers, because question style is board-specific.

Sources & how we know this

AQA GCSE Design and Technology (8552) specification — AQA (2017)