Explain economies and diseconomies of scale
Relate growth to falling average costs and recognise coordination problems that can raise them.
Section 4 · Operations management
Exam scope and assessment notes
Cambridge IGCSE Business Studies 0450, 2026 syllabus, Version 2. Use the 2026 A*–G route; this qualification changes to 0264 for first assessment in 2027. Candidates are not assessed on constructing income statements or statements of financial position, nor on price-elasticity or exchange-rate calculations. Simple cash-flow forecast construction is assessed. Written practice is self-checked, not an official Cambridge grade; timed-paper evidence and human subject-teacher review remain outstanding.
Before you begin
- No previous operations study is assumed. Read the time period, output unit, cost data and operating constraints before calculating or recommending.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What happens in an economy of scale?
What you will learn
- Define economies and diseconomies of scale
- Recognise five economy types
- Explain coordination problems in larger firms
Scale can lower average cost
Economies of scale occur when average cost falls as the scale of production increases. The syllabus types are purchasing, marketing, financial, managerial and technical economies.
Larger orders may improve purchasing terms; advertising cost may be spread over more units; lenders may offer better access or terms; specialist managers or equipment may be affordable at greater scale.
Growth can create diseconomies
Diseconomies of scale occur when average cost rises as the organisation becomes too large or difficult to coordinate. The syllabus examples include poor communication, lower employee commitment or loyalty, weak coordination and loss of control.
Growth does not guarantee economies. A business should compare its scale benefits with the communication, management and capacity needed to serve the larger operation.
Pause and explain
Which is a syllabus example of diseconomies of scale?
Worked example
A large manufacturer negotiates a lower price for bulk materials but introduces two extra management layers. Identify one possible economy and one diseconomy.
Show the worked solution
- The bulk price reduction is a purchasing economy.
- Additional layers may slow communication.
- The net effect depends on savings versus coordination cost.
Answer The lower bulk-material price is a purchasing economy. Extra management layers may create communication or coordination diseconomies; compare the savings with any added cost or delay.
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Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
A business spreads its national advertising cost across four times as many units. Which economy may occur and why?
Give me a hint
Consider the average promotion cost per unit.
Compare my reasoning
- The total campaign cost may stay similar.
- More units share the campaign cost.
- The average marketing cost per unit can fall.
A marketing economy may occur because the campaign cost is spread over more units, lowering average marketing cost per unit if sales volume actually increases as planned.
Look for these in your work
- Economy type named
- Mechanism explained
- Volume condition included
A company grows quickly, and teams duplicate orders because managers do not share updates. Explain the likely cost effect and one response.
Give me a hint
Connect communication failure to wasted resources and coordination.
Compare my reasoning
- Duplicated orders waste money or inventory.
- Poor communication is a diseconomy of scale.
- Shared systems and clear responsibility can improve coordination.
The company may face higher average costs from duplicated orders, a diseconomy linked to poor communication and weak coordination. Shared order information and clear responsibilities may reduce duplication.
Look for these in your work
- Cost effect linked
- Diseconomy identified
- Response matched
A business says its average cost fell after expansion, so it should keep expanding. Explain why the conclusion is too broad.
Give me a hint
Past cost changes do not prove that the next scale brings the same effect.
Compare my reasoning
- Averages may change with output, technology and mix.
- Further growth can create communication and control problems.
- Compare expected demand and marginal capacity costs.
The fall may reflect economies at the earlier scale, but further expansion could add diseconomies, capacity costs or unsold stock. The business should assess demand, expected average costs and its ability to coordinate more activity before growing again.
Look for these in your work
- Past and future separated
- Diseconomies considered
- Evidence requested
Common mistakes
- Equating economies of scale with profit
- Assuming average cost falls at every output level
- Calling a one-off discount an economy without considering unit cost
What can you explain now?
What happens in an economy of scale?
Compare with the explanation
Average cost falls as production scale increases
This is the concept of economies of scale.
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Make it stick
Name three economies and two diseconomies of scale from the syllabus list.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.