1.5 Growth and evolution

Internal economies lower long-run average cost as output rises; diseconomies raise it when coordination or control becomes harder. External economies/diseconomies come from the surrounding industry, not from the firm alone.

Scale changes average cost through purchasing, technical, managerial, financial and marketing effects. The benefit stops when complexity, communication or motivation costs grow faster than the saving. External changes affect several firms in the same location or industry.

Compare average cost before and after growth, identify the source of the change, and state the condition that limits the scale benefit.

A bakery chain buys ingredients in bulk and spreads a manager's cost across more loaves, so unit cost falls. If ten branches then need slow layers of approval, coordination cost pushes average cost up: the same growth can move from economy to diseconomy.

A bigger firm is not automatically more efficient; scale is useful only if the relevant cost per unit falls.

Internal growth expands a business using its existing operations; external growth changes scale by combining with, acquiring or partnering with another organisation.

Internal growth is usually slower but keeps systems and culture under the firm's control. External growth can add customers, assets or capabilities quickly, but integration, finance and culture create risk.

Ask whether the extra capacity is built by the business itself or obtained through another organisation; then compare speed, control, cost and integration risk.

A café opens three more branches using retained profit: internal growth. Buying a local bakery to gain its ovens and customers is external growth; the buyer must still integrate staff and standards.

A larger sales figure alone does not reveal the growth method; trace where the new capacity came from.

Businesses may grow to increase market share, revenue, profit, survival, economies of scale or market power, but the benefit depends on the cost and context of growth.

Growth can spread fixed costs, strengthen bargaining power and make the firm harder to displace. It can also require debt, reduce flexibility or create diseconomies, so “grow” is not an objective without a reason and measure.

State the reason, the expected mechanism and the risk that could prevent the benefit.

A solar installer expands to win regional market share; more volume may lower equipment cost and improve bargaining power. If expansion requires expensive debt before demand is secure, survival may worsen instead.

Growth is not automatically success: explain which objective improves and when.

Staying small can preserve owner control, flexibility, personal service, niche focus and lower exposure to growth-related risk. It is a strategic choice when the value of agility or specialisation exceeds the gains from scale.

A small firm can respond quickly and know customers closely, but may face higher unit costs and less bargaining power. The decision depends on market size, finance, leadership capacity and the service customers value.

Compare the opportunity cost of growth with the reason for remaining small; do not treat size as a virtue by itself.

A specialist repair shop refuses a national rollout because its customers pay for the owner's expertise and rapid custom work. It accepts higher unit costs to protect differentiation and control.

Small does not mean unambitious or automatically safer; identify the trade-off.

Mergers, acquisitions, takeovers, joint ventures, strategic alliances and franchising all obtain external growth, but they differ in control, speed, finance, risk and integration.

A merger combines organisations, an acquisition or takeover gives one firm control, a joint venture creates a jointly owned activity, an alliance coordinates without full ownership, and franchising lets others operate under a business model and brand. The right method depends on the capability and control required.

Choose the method by matching the desired control and speed with finance, partner risk and integration difficulty.

A restaurant wants rapid overseas presence but limited capital, so franchising transfers operating responsibility while preserving brand rules. Buying every outlet would give more control but require more finance and integration.

Calling every partnership a merger hides the ownership difference; name who controls what after the deal.