Interestingly, four of the positions for which I was called for an interview.... In fact, I got called for interviews during the same week for the four positions. All four departments had received a copy of my CV via friends of mine. I applied formally, but I also had them circulate my CV. Some managers do not believe in the system, so if you know somebody inside who can circulate your CV and say, “Oh, by the way, there's a good candidate in the pool. Let's pick from the pool.”
I was in the pool, and my CV was also circulated on an informal network. We have to use the system, but then bypass the system in order to be called for an interview.