> A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never works and cannot be patched up to make it work. You have to start over, beginning with a working simple system. - John Gall

Mr Gall wrote a book about complex systems and how they fail back in the 70's and most of it (from what I recall it's been a while since I read it) applies as much now as it did then, it's a very good read.