Franchising, new stores, e-commerce, outsourcing, mergers and takeovers — growth can cut a business's costs through economies of scale, but push it too far and diseconomies of scale can start eating those gains straight back up.
Growth is one of the seven business objectives you met in 3.1.3 — a way to increase sales, market share, and ultimately profit. But how a business grows matters just as much as whether it grows: different methods of expansion carry very different costs, risks and speeds.
Expansion also rarely happens by accident. It's usually a deliberate response to something the business has already achieved or noticed — perhaps demand has consistently outstripped what a single site can supply, perhaps a competitor is expanding faster and threatening to capture market share first, or perhaps the business has simply built up enough profit and confidence to justify the risk of investing in growth. Whatever the trigger, the decision about which method to use is where this chapter's real substance lies.
AQA splits expansion into two broad categories: organic growth, where a business grows using its own resources and effort, and external growth, where it grows by joining with another business entirely.
Growth is rarely a straightforward win — AQA expects you to be able to argue both sides of the decision.
Economies of scale are the unit cost advantages a business gains as it grows larger — the average cost of producing each item falls as output rises. AQA specifically wants you to know two types.
Buying raw materials or stock in much larger quantities lets a business negotiate lower prices per unit from suppliers — a bulk discount that a small business simply can't access.
Larger businesses can afford specialised machinery or mass-production techniques that would be far too expensive to justify at a smaller scale — the huge upfront cost gets spread across many more units of output.
This is the figure economies of scale actually improve — as output rises faster than total cost, the average cost of each individual unit falls.
Enter figures for a business at two different output levels and compare the average unit cost.
Growth doesn't lower costs forever. Past a certain size, a business can become genuinely harder to run well, and average unit costs can start rising again — this is called a diseconomy of scale.
Messages and decisions take longer to reach everyone accurately as a business grows more layers and more sites.
Keeping departments, sites or newly-merged teams working towards the same goal becomes far harder at scale.
Employees can feel like a small part of a huge machine, losing the sense of ownership and recognition they had in a smaller business.
Diseconomies of scale are one of the clearest examples of a genuine drawback of growth — not just a smaller version of the same benefit, but a real risk that expansion can create problems a smaller business never had to face. Crucially, this connects directly to organisational structure: as a business adds more layers of management to cope with its larger size (see 3.4.1), each of the three problems above tends to get worse, since more layers mean messages travel further, more sites mean more moving parts to coordinate, and more distance between senior leadership and frontline staff makes it harder for employees to feel their individual contribution is noticed or valued.
Drag each method of expansion into the correct category.
State two methods of business expansion.
Structure guide: two correctly named methods — 1 mark each, no explanation required.
State and explain two reasons why Corvid Bikes' average cost per bike might fall if Amara goes ahead with the expansion.
Structure guide: state a reason grounded in the case study (1 mark), explain it (1 mark) — repeated twice over.
Calculate Corvid Bikes' average unit cost of production before and after the expansion. Show your working.
Structure guide: before expansion, £600,000 ÷ 2,000 = £300 per bike. After expansion, £1,000,000 ÷ 4,000 = £250 per bike — a fall of £50 per bike, demonstrating economies of scale. Marks are typically awarded for correct workings even if the final figure is wrong.
Analyse the risks Corvid Bikes might face from diseconomies of scale as a result of this expansion.
Structure guide: a single developed line of reasoning grounded in the case study (eg: hiring 25 new staff within a few months gives little time for proper training and induction → this could lead to poor communication and coordination on the factory floor → increasing the risk of quality problems or wasted materials → which could offset some of the £50 per bike cost saving calculated above).
Recommend whether Amara should go ahead with doubling Corvid Bikes' production. Justify your answer using the case study.
Structure guide: a "recommend" question needs a justified judgement — weigh the clear economies of scale benefit (a £50 per bike cost saving) against the diseconomies of scale risk from rapidly hiring 25 new staff, before reaching a clear final recommendation.