Manufacturing method selection is driven by the scale of production required. VCAA expects students to understand how different methods suit different production volumes and why designers and producers choose specific approaches.
| Category | Quantity | Example Products |
|---|---|---|
| One-off | 1 unit | Bespoke furniture, custom prosthetics |
| Low-volume (batch) | Tens to hundreds | Limited edition clothing, handmade ceramics |
| High-volume (mass) | Thousands to millions | Plastic containers, smartphones |
| Continuous | Uninterrupted flow | Paper, fuel, chemicals |
Job production (one-off)
- Each product is individually crafted to specification
- High skill level required; worker involvement throughout
- High unit cost; long lead times
- Examples: architectural models, custom jewellery, prototype garments
Batch production
- A set quantity is produced, then machinery or processes are reconfigured for the next batch
- Moderate skill; semi-flexible tooling
- Unit costs lower than job production but higher than mass production
- Examples: boutique furniture runs, specialised safety equipment
Mass production
- Continuous manufacture of identical products on assembly lines
- Specialised machinery, division of labour, minimal worker skill per task
- Very low unit cost through economies of scale
- High capital investment; inflexible to design changes
- Examples: PET bottles, car body panels, fast-fashion garments
Continuous production
- Process never stops; product flows without discrete batches
- Highly automated; minimal human intervention
- Lowest unit cost; highest setup cost
- Common in materials processing (steel rolling, paper manufacture)
| Factor | Low-Volume | High-Volume |
|---|---|---|
| Setup cost | Low | High |
| Unit cost | High | Low |
| Flexibility | High | Low |
| Skill required | High | Low (per worker) |
| Quality consistency | Variable | Consistent |
| Waste | Potentially high | Optimised over time |
KEY TAKEAWAY: Low-volume methods offer flexibility and customisation at higher unit cost; high-volume methods deliver consistency and economy at the expense of flexibility. The design must suit the intended production method.
EXAM TIP: Questions often ask you to justify a production method for a given scenario. Link your answer to scale, cost, flexibility, and the nature of the product.
