Summary:
Chapter 4 describes the methodological foundation of Selmo.
The PTF principle shows how a real process becomes a complete, logical model:
The process defines the states,
that technology describes the hardware used,
and the Function specifies which actions and feedback are represented in the control.
The chapter makes clear: Only when all three levels are described cleanly does a complete SEQ emerge.
Thus PTF is the entry point of every Selmo project – the bridge between idea and implementable model.
