I seem to remember a period in the late '60s when 'system fitters' or were they technicians were in vogue. Intended to know enough about everything to intercede between the trades on new complex aircraft systems. In practice (rumour had it) didn't know enough about anything to be useful.
The most efficient posting I was on was 'Borneo Jet Force' during Confrontation. Two of each trade needed, 24 hrs. on, 24 off so there was always 1, and cross trading to help the one who knew what he was doing when two or more sets of hands needed. Air Radar Fitters doing engine changes, etc. Seemed to work very well.