About Functions

A function component calculates an amount from context properties. Function components make up the leaves of the decision tree and are used for calculations.

The Flat Function component, which calculates a fixed amount, is one of the simplest. The Linear Function component calculates an amount by using a numerical property. For example, the Linear Function component calculates the price of a telephone call that is charged 0.34 cents per minute.

Function components

The following function components are available with SAP Convergent Charging:

Icon	Name	Action/Usage
	Allow	Indicates that no additional logic is needed.
	Flat	Provides a constant amount based on a value or a numerical property expressed in the currency of the plan.
	Free	Represents a free service in the decision tree.
	Generic	Computes an amount P with one of these three formulae: P = A.X + B P = A.X.Y + B P = A.X + B.Y + C
	Linear	Computes an amount P with the formula P = A.X + B
	Macro	Allows to use an existing pricing macro to calculate a final amount.
	No Access	Indicates an unauthorized use of a service, an invalid access, or an unexpected case when usage events are processed.
	Polynomial	Calculates an amount by computing the sum of n number of terms in the form of A.X.Y such as: A1.X1.Y1 + A2.X2.Y2 + ... + An.Xn.Yn