You do not need to stand at the machine to see production. Field PLC data is collected and shown on a dashboard opened in a browser, so you see the live picture without waiting for the end of the shift.
Data from the PLCs and control cabinets on the lines is collected through a gateway and passed to the plant network. It is visualised on a browser dashboard reachable from a computer, tablet or phone. Your existing PLC infrastructure is kept — in most cases an added hardware and software layer is enough to make the current system observable.
There are hours between learning a line stopped from a shift report and seeing it on screen as it happens. Live monitoring lets small stoppages be noticed before they grow. The accumulated data then serves a second purpose: which line stops most at which hours, which fault repeats — so the maintenance plan rests on records rather than guesswork.