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1. Income - expenditure - adjective.

Variable costs and income are amounts that can change within a forecasting or review period.

Contrasted with fixed costs and income.

The term "variable" is a relative one, because - when a long enough time frame is considered - most items become variable.

2. Financial maths - noun.

In financial maths, a variable is a number that can take more than one value.

For example, a rate of inflation.

Contrasted with a constant, that - by definition - does not change.

3. Analysis - modelling - inputs - assumptions.

An relevant amount that - if it were to change - would be expected to change the results of analysis or modelling.

See also