Uses of a Function Hierarchy Diagram Identifies the required functions to be used by the application. Defines which functions are to remain manual and which ones are to be automated. Communication tool used with clients to gain agreement on automated functions. Establishes the basis for application design. Decomposition of a Function Root function does not have a parent function and is found at the top of the hierarchy.
Full function has a parent and at least one child function.
Leaf function can no longer be decomposed. It doesn t have any child functions and is also referred to as an atomic function. As you probably know by now, it can become difficult and even impossible to view the entire FHD at a time. Therefore, you may want to concentrate on one area at a time. How to Create a Business Function Click the Function button on the toolbar.