Which components must exist to create a transportable function module?

To create a transportable function module, it is essential to have a function group. A function module is defined within the scope of a function group, which serves as a container for related function modules. This organization allows for better management and transport of related functionalities as a cohesive unit during the development and transport processes in SAP.

A function group encapsulates all the function modules that are logically related, ensuring that they can leverage shared data and operate coherently. When you transport a function group, all the contained function modules are also transported together, maintaining the integrity of the program logic and dependencies.

Elements like type groups and module pools, while they may be useful in broader application development or for specific functionalities, are not necessary for the creation of a transportable function module specifically. A package is essential for organizing development objects into transportable units, but it does not replace the need for a function group in the context of function modules. Therefore, the function group stands out as the fundamental requirement for defining transportable function modules.