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A function is a mathematical or statistical relationship that returns a value. A function may have zero, one or more input values called arguments, but only one output value. The value of a function is calculated based on the value of its arguments (if any).
Use a function in your process model where you want to use an expression to set or change a value. For example, instead of setting an activity’s task duration to a constant value, you could create an expression that uses a function to vary the duration over a set of distributed values. You could also use functions to set or change attribute values or to change a value in one place for use in many places.
iGrafx provides a robust set of built-in mathematical and statistical functions (see System Defined Functions Reference. You cannot modify these functions, but you can define your own custom functions.
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