A BusinessFunction defines a part of the organization that has the responsibility to carry out a special function. A BusinessFunction has resources available that are managed from within the function.
A BusinessFunction can be an operational function. Which means a function where the products and services of the organization are produced.
A BusinessFunction can also be a management function. Which means a function that carries out management such as planning or control.
The objectives and available resources should be described for every BusinessFunction. It is also important to decide if the function plays an essential role in the current business analysis.
If a BusinesFunction consists of other BusinessFunctions the upper level function should be broken down to a new BusinessDiagram showing the details within the function.