The operating logic may be diagrammed to different levels of completeness of information. Whatever the level of completeness, the diagram communicates functional information explicitly to the degree ...

From a tiny sample of tissue no larger than a grain of sand, scientists have come within reach of a goal once thought unattainable: building a complete functional wiring diagram of a portion of the ...

and ISO provided guidelines as to industry usage of functional diagrams. The popular but older standards: PMC 22.1-1981, Functional Diagramming of Instrument and Control Systems; ISA 5.2-1976, Binary ...