CMA Foundation · Fundamentals of Business Economics and Management

Means of Production: formula sheet

Full chapter guide

Key formulas

Factor and reward pairs: Land → Rent; Labour → Wages; Capital → Interest; Enterprise → Profit; Most direct MCQs test this matching.
Profit as residual: Profit = Total revenue − Payments to land, labour and capital (and other costs); Profit is not fixed and can be a loss. Others are contractual payments.
Fixed vs working capital: Fixed capital = durable, used repeatedly; Working capital = used up or converted in one cycle; Machinery is fixed capital; raw materials and cash for wages are working capital.
Key features of land: Gift of nature + fixed supply + no cost of production + permanent + varying fertility; Fixed supply applies to land as a whole, not to a particular use of it.
Key feature of labour: Inseparable from the labourer + perishable + cannot be stored; Active factor, unlike land and capital.
Division of labour: Division of labour = splitting a job into separate tasks, each done by a different worker; Learn this as a process: the work is divided, not the workers.
Specialisation: Specialisation = a worker, firm or region concentrating on one activity; It is the result of division of labour, not the same thing.
Output per worker: Output per worker = Total output ÷ Number of workers; Use this to show the productivity gain in numerical questions.
Main advantages: Skill ↑, time saved, machines used, right person in right job, lower cost per unit; Five points cover most MCQs.
Main disadvantages: Monotony, loss of all-round skill, dependence on others, unemployment from machines, less responsibility; Pair each advantage with its opposite to remember them.
Limiting factor: Division of labour is limited by the extent of the market; A well-known statement associated with Adam Smith.
Reward of enterprise: Profit = Total revenue − Total cost (including rent, wages and interest); Profit is a residual. It can be positive, zero or negative.
Core functions of an entrepreneur: Initiation + Organisation + Decision-making + Risk bearing + Innovation; Learn the five in this order. Risk bearing and innovation are the most tested.
Risk versus uncertainty: Insurable risk can be shifted. Uncertainty cannot be insured and is borne by the entrepreneur.; Profit is often called the reward for bearing uncertainty.
Entrepreneur versus manager: Entrepreneur: owner, risk bearer, paid in profit. Manager: employee, no risk, paid a salary.; Use reward and risk as the quick tests.
Increasing returns to scale: % change in output > % change in all inputs; Doubling inputs gives more than double output.
Constant returns to scale: % change in output = % change in all inputs; Doubling inputs gives exactly double output.
Decreasing returns to scale: % change in output < % change in all inputs; Doubling inputs gives less than double output. It is the output-side counterpart of diseconomies of scale.
Percentage change: % change = (New − Old) ÷ Old × 100; Use it to compare output growth with input growth.
Returns to scale vs returns to a factor: Returns to scale: all inputs vary (long run). Returns to a factor: one input varies, others fixed (short run).; The law of variable proportions is returns to a factor. Decreasing returns to a factor belong to the short run.

Quick revision

The four factors of production are land, labour, capital and enterprise.
Rewards: land earns rent, labour earns wages, capital earns interest, enterprise earns profit.
Land is a gift of nature and is fixed in total supply.
Labour is human effort and cannot be separated from the worker.
Capital is produced wealth used to produce further goods.
Division of labour splits a job into smaller tasks done by different workers.
Specialisation raises skill and output but can make work monotonous.
The entrepreneur organises the factors, takes decisions and bears risk.
Profit is the reward for enterprise and can be negative as a loss.
Returns to scale refer to the change in output when all inputs change in the same proportion.
Increasing returns: output rises by a greater proportion than inputs.
Constant returns: output rises in the same proportion. Diminishing returns: output rises by a smaller proportion.

Common mistakes

Saying land has a cost of production. Fix: Land is a gift of nature and has no cost of production. Its price is a market price, not a production cost.
Calling money or a machine 'land' or treating money itself as capital in every case. Fix: In economics, capital is man-made wealth used for further production. Idle cash or a house used only for living is not productive capital.
Treating division of labour and specialisation as exactly the same thing. Fix: Remember: division of labour is the splitting of work; specialisation is the skill and focus that results.
Confusing division of labour with division of work among machines or departments only. Fix: It means dividing tasks among workers. It can also apply across occupations and regions.
Treating profit as a fixed payment like wages. Fix: Remember that profit is a residual after paying rent, wages and interest. It can be a loss.
Calling a salaried manager an entrepreneur. Fix: Ask who bears the risk. If the person only gets a salary, it is a manager.
Treating the law of variable proportions as returns to scale. Fix: Ask if all inputs changed. If only one input changed, it is variable proportions.
Calling a cheaper input from a nearby supplier cluster an internal economy. Fix: If the benefit comes from industry growth, it is external, even though one firm enjoys it.

Exam tips

Direct matching questions on factors and rewards are common, so memorise the four pairs until they are automatic.
In EXCEPT or NOT questions on land, remember that 'has a cost of production' and 'supply can be increased easily' are the usual false statements.
For fixed versus working capital, give a quick test: used again and again or used up? Do not judge by price.
Remember that enterprise is the only factor whose reward is uncertain, and use this to eliminate options.
With no negative marking, attempt every question. Eliminate two options and guess if unsure.
Questions are usually direct: meaning, type, advantage or disadvantage. Learn one-line definitions.
Learn the types with one example each, since MCQs give an example and ask for the type.
In drawback questions, look for words like monotony, dependence, unemployment and loss of skill.