ISO/TS 10303-1453:2014-02 specifies the application module for
Function based behaviour.

The following are within the scope of
ISO/TS 10303-1453:2014-02:

• identification of a behaviour;
• hierarchy of behaviours;
• function based representation of behaviour;
• hierarchy of functions within a function based behaviour representation;
• means of representing the inputs and outputs of a function, including triggering mechanisms where appropriate;
• ordering of functions, and identifying decision points;
• identification of shared resources used by function;
• shared resource properties;
• underlying model for the representations: Function Flow Block Diagram (FFBD),
  Data Flow Diagram (DFD), N2 (N-Squared) Chart, IDEF0 Diagram, Use Case, Sequence Diagram,
  Enhanced Function Flow Block Diagram, and Behaviour Diagram (BD).