I’ve been working manufacturing since the mid-1980s. Mostly small electronics stuff, connectors, drives, software, sensors, (pressure and fluid).
But I don’t work the floor, I work legacy IT, which drives the biz, so I get to visit all aspects of the process, from selling, to buying, A/P, A/R, receiving, inspection, Q/C, make parts from raw materials, buy parts to assembly, then finished goods, and shipping.