Interesting stuff but don't most of today's lines operate w/ individual AGV units carrying each car that can be pulled aside without stopping the rest of the line and if that unit is pulled, parts scheduled for it get sidetracked somewhere too?.
This completely unlike the old days where there was no way to pull a car off the line as the whole line would have to have been stopped so they'd tag cars w/ problems and let them continue along for repairs later?.
~ Pete