How are products shaped by cutting material away or by joining material together?
Wastage and addition processes: shaping by removing material (sawing, drilling, turning, milling, laser cutting) and by joining material together (adhesives, mechanical fixings, welding, soldering), and choosing the right process for a material.
A focused answer to OCR GCSE Design and Technology J310 on wastage and addition processes: shaping by removing material and by joining material together, and matching the process to the material.
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What this dot point is asking
OCR J310's manufacturing content groups processes by how they shape material. This dot point covers wastage (removing material) and addition (joining material). You need to name suitable processes for a material and task, and know whether a joining method is permanent or temporary. In the written exam this is tested by matching a process to a job and by explaining how parts are joined.
Wastage processes
Wastage suits taking an accurate shape from solid stock, but it produces waste, so efficient layout (nesting) matters for cost and sustainability.
Addition processes
The permanent or temporary choice is the point examiners reward: a flat-pack product uses temporary KD fittings so the buyer can assemble it; a welded frame is permanent for strength.
Try this
Q1. State whether drilling is a wastage or an addition process. [1 mark]
- Cue. Wastage (material is removed to make the hole).
Q2. Name one temporary joining method and one permanent joining method. [2 marks]
- Cue. Temporary: screws or KD fittings. Permanent: glue, welding, riveting or nailing.
Exam-style practice questions
Practice questions written in the style of OCR exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
OCR J310/01 20193 marksName a suitable wastage process for each of the following: cutting a curved shape from acrylic sheet; making a round hole in a steel plate; cutting a length of timber to size.Show worked answer →
A 3-mark question, one mark per sensible process.
Cutting a curved shape from acrylic: a laser cutter (or a coping/scroll saw) follows a curve cleanly. Making a round hole in steel: drilling with a twist drill in a pillar drill. Cutting timber to length: sawing with a tenon or panel saw (or a powered crosscut saw).
Markers reward a correct process matched to each task. These are all wastage processes because material is removed. A wrong or unsafe match (for example a laser cutter for steel at GCSE level) loses the mark.
OCR J310/01 20214 marksA wooden box needs its corners joined. Explain two ways the corners could be joined, including whether each can be taken apart again.Show worked answer →
A 4-mark Explain wants two joining methods with a permanent/temporary judgement.
Method 1, adhesive (PVA wood glue), often with a joint such as a butt or finger joint. This is a permanent addition method: the glue cures and the corner cannot be taken apart without damage, but it is strong and neat.
Method 2, mechanical fixings (screws). Screws can be driven to join the corners and, unlike glue, can be unscrewed, so the joint is temporary and can be taken apart for repair or flat-pack assembly, though screw heads show.
Markers reward two methods, each with how it joins and whether it is permanent (glue, nails) or temporary (screws, knock-down fittings). Naming methods with no permanent/temporary point caps the mark.
Related dot points
- Deforming and reforming processes: shaping by deforming material (line bending, vacuum forming, press forming, laminating) and by reforming it from a liquid or molten state (casting, injection moulding, blow moulding), and matching the process to the material and quantity.
A focused answer to OCR GCSE Design and Technology J310 on deforming and reforming processes: shaping by bending material and by melting and reforming it, and matching the process to the material and quantity.
- Scales of production: one-off (bespoke), batch, mass and continuous production, the features and trade-offs of each, and how the scale influences process choice, cost and the use of CAM.
A focused answer to OCR GCSE Design and Technology J310 on scales of production: one-off, batch, mass and continuous production, their features and trade-offs, and how scale drives process and cost.
- Quality control and accuracy: tolerances and how to read them, quality control checks during production, and using jigs, templates, patterns and CAM to ensure accuracy and consistency in batch and mass production.
A focused answer to OCR GCSE Design and Technology J310 on quality control and accuracy: tolerances and how to read them, quality checks, and using jigs, templates and CAM for consistency.
- Surface treatments and finishes: why materials are finished (protection, appearance, function), and the finishes that suit each material category, including paint and varnish for timber, painting and plating for metals, and self-finishing for polymers.
A focused answer to OCR GCSE Design and Technology J310 on surface treatments and finishes: why materials are finished, and the finishes that suit timber, metals, polymers and textiles.
- Selecting and costing materials: the factors that influence material choice (function, properties, aesthetics, cost, availability and sustainability), stock forms and stock sizes, and calculating material cost from stock forms and quantities.
A focused answer to OCR GCSE Design and Technology J310 on selecting and costing materials: the factors that influence choice, stock forms and sizes, and calculating material cost from stock forms and quantities.
Sources & how we know this
- OCR GCSE (9-1) Design and Technology (J310) specification — OCR (2017)