Fuse to Label

I am reading a new book called : How Toyota Became #1.

It revolves around lean manufacturing and also talks about Toyota's 5-Question method :

1. Why did the machine suddenly stop? Because it blew a fuse.
2. Why did a fuse blow? Because the fuse wasn’t the right size.
3. Why was the wrong sized fuse in the box? Because one of the engineers put it there.
4. Why did the engineer do that? Because somebody in the supply room issued the wrong size fuse.
5. Why? Because the stock bin for fuses was mislabeled.

Analysis to the very root of the problem is the best long term solution. How true!! And how true that majority are caught in the symptomatic treatments and end up in temp solutions.