Interchangeable

I am reading a book about Gould, Rockefeller, Morgan and Carnegie right now.  It also talks about the American Economy after the civil war.  One of the things it talked about was the race to get guns to be interchangeable. 

Interchangeable also seems to me to be efficient, and in the business world efficient matters.

I am not going to write much but I would think of it this way.  An employees goal should be to be as non interchangeable as possible once they get a position.  It's in a person's best interest to be unique in irreplaceable. 

It's probably in management's best interest to make someone as interchangeable as possible.

Now in the business world I'd argue that this happens more frequently with low skilled positions.  Those positions management wants to be interchangeable. 

With professional trades it's probably difficult to have that happen.