Switching 

Switches are assigned to switchable objects – that is, packages and directly switchable elements. Switches belong to business functions with the cardinality n:m.

A business function is a self-contained function with switches for objects of the relevant functionality. When you activate a business function, all corresponding switches are switched on.

Business functions belong to business function sets with the cardinality n:m. A business function set forms a unit covering the functionality of an industry solution. All business functions of a business function set are compatible with one another. On an ABAP-based SAP system, you can switch on no more than one business function set.