What strikes me the most is not the quality of the repairs as such.
I watch as they continually throw a just-completed or just-repaired part into the dirt, and then pick it up later, clean it off, do something else to it, and then throw it in the dirt to then have to do the cleaning all over again. Commonly, at some point they will put the part onto a big piece of cardboard to keep it sort of clean...why not do this at every step?
Or when making a bunch of parts, they complete an op and throw the part on the floor until there is a big pile of parts-at that time, someone comes along and picks up each individual part and puts them all in some sort of carrying device, to move them to the next op. Why not put the carrying device on the floor and throw the parts into it as they complete the op?
I watched one last night where a guy was turning, threading, and parting a round that started out somewhat banana-shaped. He got it turned to cylindrical, threaded the end of it for about 3 or 4 inches, then went to part off about 12" from the stock.
He parted it most of the way through, then removed the stock from the lathe and proceeded to break the completed piece of work off by banging the freshly-threaded end against what looked like a concrete floor.