Three things, and they compound. Changeovers are frequent, so the machine is taken apart and put back together far more often than it is repaired. The line is a chain, so a stoppage on one machine is a stoppage on all of them. And the equipment is rarely one vintage — a machine bought this decade feeds one bought two decades ago, through a conveyor someone in the plant built. Where does changeover knowledge actually live today? Usually with two people — the setter and the technician — and neither has any way to write it down as a place on the machine. It gets written as a sentence instead: “Adjust the side guide at the infeed.” Which side guide, how far, and relative to what, stays with the person. MYREX gives that knowledge an address. A mark (a pinned location on the machine) sits on the high-definition 3D capture of that exact machine. A photo of the correct guide position, a short video of the adjustment, and a note about the carton size it applies to attach to the mark. The next person opens the machine, finds the place, and sees what the last person saw.