Production, Productivity & Economies of Scale
Production vs Productivity: Not the Same Thing
Production refers to the total output a firm creates — for example, a car factory assembling 500 vehicles in a week. Productivity is different: it measures how much output is generated per unit of input, usually per worker. A factory that makes 500 cars using 50 workers has labour productivity of 10 cars per worker per week.
Why does the distinction matter? A firm can increase production simply by hiring more workers or buying more machinery — that is just doing more of the same. Increasing productivity means getting more output from the same inputs, which lowers the cost of producing each unit. That is what makes a firm genuinely more competitive.
Labour productivity = total output ÷ number of workers. Higher productivity means more output from the same workforce, so average cost per unit falls — giving the firm a competitive advantage.
How Firms Raise Productivity
Three main routes drive up productivity. First, investment in training: workers who understand their tasks better make fewer mistakes and work faster. A supermarket checkout operator who is trained to handle self-service machines can supervise four tills instead of one, quadrupling their personal output.
Second, investment in technology and capital equipment: replacing manual processes with machines raises output without increasing headcount. Amazon’s fulfilment warehouses use robotic picking systems that handle thousands of parcels per hour — far beyond what manual sorting could achieve. New machinery often embodies the latest technological advances, so every £1 invested buys more productive capacity than the previous generation of equipment.
Third, better organisation through specialisation: when workers focus on one task they become more skilled and faster at it. A GP surgery that employs one receptionist to handle all admin, one nurse to carry out routine checks, and one doctor to make clinical decisions is more productive than if each person tried to do everything. The division of labour (covered in the resource allocation unit) underpins this logic.
Imagine two rival bakeries. Bakery A employs 10 workers and bakes 200 loaves a day. Bakery B employs 10 workers and bakes 400 loaves a day. Production is higher at Bakery B — but what matters competitively is productivity: Bakery B produces 40 loaves per worker per day versus 20 at Bakery A. Bakery B’s average cost per loaf is roughly half that of Bakery A’s, assuming similar wages and materials. Bakery B can therefore charge a lower price and still make the same profit margin — or charge the same price and earn a higher profit. This is why governments and firms both try to raise productivity rather than simply expand production.
Economies of Scale
As a firm grows and increases its output, its average cost — the cost of producing each unit — often falls. This happens because fixed costs are spread across more units, and because large firms can operate more efficiently. The fall in average cost that comes from increasing the scale of production is called economies of scale.
To picture this without a graph: imagine a small bakery rents its premises for £1,000 a month and produces 1,000 loaves. Its rent cost per loaf is £1. If the same bakery expands and produces 10,000 loaves using the same premises, the rent cost per loaf falls to just 10p. The fixed cost has been “diluted” across a much larger output. Now add in the efficiency gains below, and average cost falls even further.
There are five main types of internal economy of scale: purchasing (bulk-buying discounts), technical (specialist machinery), managerial (dedicated expert managers), financial (lower borrowing costs), and risk-bearing (spreading risk across product lines). All reduce average cost as output rises.
The Five Types of Internal Economy of Scale
Purchasing economies: Large firms buy raw materials and components in bulk and negotiate lower prices per unit. A supermarket chain ordering ten million tins of baked beans pays a fraction of the price per tin that a corner shop pays. This lowers the variable cost per unit sold.
Technical economies: Large firms can afford specialist, high-capacity machinery that smaller firms cannot justify purchasing. A mass-market car manufacturer uses robotic welding lines that work continuously with high precision. The high fixed cost of the equipment is offset by the enormous volume produced — the cost per car is very low.
Managerial economies: A large firm can employ specialists — a marketing director, a finance director, an operations manager — who are experts in their field. A small firm cannot afford to hire all these people, so its owner must do everything, usually less efficiently. Each specialist improves output in their area, lowering average cost across the business.
Financial economies: Large, well-established firms are seen as lower-risk by banks and investors, so they can borrow money at lower interest rates. A small start-up might pay a higher interest rate on a business loan because lenders fear it might fail. The lower interest payments for a large firm reduce its costs and improve profitability.
Risk-bearing economies: Large firms often operate across several markets or product lines. If one product line performs poorly, the others can compensate. A small firm selling only one product has all its risk in one place. By spreading risk, the large firm faces less uncertainty, which can lower its cost of capital and encourage investment.
Diseconomies of scale occur when a firm grows so large that its average cost begins to rise instead of fall. The most common cause is poor communication and coordination in very large organisations. When a company employs thousands of people across multiple sites, messages get distorted, decisions take longer to make, and workers can feel disengaged — reducing motivation and productivity.
A small independent restaurant can adjust its menu overnight in response to customer feedback. A national restaurant chain must route the same change through regional managers, head office approval, and supply chain teams — a process that can take weeks. This management inefficiency pushes up costs per unit. It is one reason why some large firms choose to break their operations into smaller, semi-autonomous units rather than running everything centrally.
Economies of Scale and Competitiveness
When a firm benefits from economies of scale, its average cost falls below that of smaller rivals. This gives it two strategic options: it can charge a lower price and win market share, or it can charge a similar price to competitors and earn a higher profit margin. Either way, it has a competitive advantage. This is why large supermarkets, airlines, and car manufacturers can often undercut smaller rivals — their scale reduces the cost of each unit they produce or sell.
It also explains a key pattern in modern economies: industries where economies of scale are very large tend to be dominated by a small number of huge firms. Once a firm gains scale advantages, it becomes very hard for new, smaller entrants to compete on price. This creates barriers to entry and is one reason why some markets have only a few dominant players.