So true.
As a side note the big company I worked for implemented JIT about 15 years before I retired and one of the things they did was build a huge parking lot that looked like a truck stops parking lot. We built locomotives and this parking lot had 100s of tractor trailer, trailers parked out there. They were full of parts that we didn’t own but our vendors stored on our property. We would place an order for one gizmo and they would email a confirmation and bill us and our fork truck guy would drive out and get one gizmo out and take it where it was needed.
I about blew a gasket at the stupidity of this system but the bean counters kept touting how JIT was saving us millions a year. Strangely the vendors all raised their prices and the cost of building a locomotive went up.
Another example of lunacy was I was put in charge of a cost reduction project with burn nesting using computers to figure out how to get better usage out of a sheet of steel on our burn tables. Starting out we threw away about 50% of the steel as scrap around the parts we made. By twisting and turning and flipping the parts we took out another 15% of the scrap. Then we looked ahead and saw other small parts we needed say in the next month that would fit in the scrap areas and we could save all this steel making stuff we knew we would need. We got the scrap down to between 10-15% and we are talking 100s of tons of steel. The bean counters then said why are we making these parts a month ahead of time? Answer because the material is free. They said stop doing it you are costing us a fortune in inventory costs, plus we get good money for that scrap and you are making that revenue stream diminish. Ya ten cents on the dollar. So guess what we went back to where we were to save inventory.