Metrics?

["Chris A. Icide" <chris () priori net>]

This is an request for some information for a presentation I'm looking at
putting together.

I was wondering what special things that people out there use routing
metrics for?  For example, IGP metrics might be used to determine the
shortest path through a network when two paths exist.  Some people define
these staticaly, some dynamicaly.  Metrics in the EGP might be used to tell
a peer or customer the "distance" from the destination from that particular
edge location in your network.  Obviously, these are the simple uses, what
are the other uses that folks put metrics to?

-Chris