|Definition:|| ratio of two quantities, used as a multiplier to express the proportionality equation between them
NOTE 1 – The term "factor" is also used to designate each element in a product of two or more elements, e.g. a numerical factor in a quantity equation, the dimension of a base quantity in the dimension of a quantity.
NOTE 2 – A factor is a quantity of dimension one. Examples: coupling factor, quality factor, peak factor, power factor.