Comment by rcxdude

It is brittle, or at least it's got a limited life. When you don't have these things, you lose the knowledge that set up the system in the first place, and you can be SOL when something breaks. I'm not saying just change things willy-nilly, but if you don't have an active process of understanding and interacting with the way that your factory is set up, you're going out of business, you just don't know when.