The S4 Service Functions view defines the behavior of a service in terms of the functions it is expected to perform. S4 is the key behavioral specification for services. Equivalent in nature to L4 - Logical Activities and R4 - Resource Functions, it specifies a set of functions that a service implementation is expected to perform.
Implementation
The S4 view can be represented using:
S4 Service Functions Taxonomy diagram based on the UML Clas diagram. S4 Service Functions Taxonomy diagram
S4 Service Functions diagram for the Operational Activity flows. This diagram is based on the UML Activity diagram. S4 Service Functions
