You get fired. My dad towards the end worked at a parts plant for Ford so he had a quota. If you cannot keep up with the line then you are gone. It's not as simple as just sitting around waiting, screw in one bolt, than wait. My dad in the begining worled at Wixom in the 70's doing the radiators on the F150's. he had to pick up the radiator and shroud without the assistance of any machines or lifts, set in the truck and line it up, bolt it in, hook up the hoses, and as soon as he was done, he had to grab the next radiator. Not even time to wipe the sweat off your forehead.