📉 What are economies of scale?
Big Idea: Economies of scale happen when a business grows bigger and its average cost per unit falls. The more you make, the cheaper each one becomes! 📦📦📦
Why do costs fall?
When a business produces more, it can spread its fixed costs over more units and negotiate better deals.
- Fixed costs are shared across more output → lower average cost
- Bulk buying gives discounts on raw materials (purchasing economies)
- Specialist machines and workers become worthwhile (technical economies)
- Easier and cheaper to borrow money (financial economies)
- Can afford specialist managers (managerial economies)
- Marketing costs are spread over more sales (marketing economies)
If an exam asks you to 'define economies of scale', say: the reduction in average cost per unit as a business increases its scale of production.
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🏷️ Types of economies of scale
There are several different types, each explaining a different reason costs fall as a business grows.
- Purchasing — bulk buying discounts from suppliers
- Technical — using large-scale machinery and technology more efficiently
- Financial — banks offer lower interest rates to larger, safer businesses
- Managerial — hiring specialist managers for different departments
- Marketing — advertising costs are spread over many more units sold
Example: A car manufacturer buys steel in huge quantities, getting a much lower price per tonne than a small workshop.
Remember the types: 'Please Try Finding More Money' — Purchasing, Technical, Financial, Managerial, Marketing! 💡
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📈 Diseconomies of scale
Big Idea: Diseconomies of scale happen when a business gets too big and average costs start rising again. Bigger isn't always better! 🐘
Why do costs rise?
- Communication problems — harder to share information across a huge business
- Coordination difficulties — managing thousands of workers and processes is complex
- Motivation drops — workers feel like a small cog in a big machine
- Slow decision-making — too many layers of management
- Waste and inefficiency — harder to monitor everything
Example: A global fast-food chain may find that some locations waste food because head office can't monitor every store closely.
Exam tip: 'Define diseconomy of scale' = an increase in average cost per unit as a business grows beyond its optimal size.
⚖️ Putting it together
Every business has an optimal size — where average costs are at their lowest. Below that, there are economies of scale. Above that, diseconomies kick in.
- Small business growing → enjoys economies of scale → costs fall
- Business gets too large → diseconomies kick in → costs rise
- The sweet spot is where average costs are lowest
In 10-mark questions, you can argue both sides: growth brings economies of scale BUT may also lead to diseconomies if the business grows too fast.