New Technical Function
In this part, the Product is seen as a white box and we will decompose it in technical domains, identify the relations and interactions between these domains.
A Function is a part of the effective behavior of the Product, so it is from the Product's point of view and not that of the Actor.
TECHNICAL FUNCTION
The technical functions correspond to the technical domains identified.
The interfaces created at the Service level, will still be used at this level.
Switch to the “Function” tab in the Overview and double click on the structure diagram of the service to open it:


To create a function, drag & drop a New Function on the diagram and type its name in the following window:

Repeat this operation to create other functions:

They also appear in the Overview tab (refresh if necessary):

After creating all the Functions, we will implement the Sequence Diagrams.