Jay Cross has a fun graphic in his post on Internet Time Blog: The shortest presentation on metrics you will ever hear
This is his "real world learning model" that, while someone tongue-in-cheek, but also has a lot of reality. I love that he includes the Shadow Organization, Grapevine and Rumor as parts of network of learning in an organization. It's all his copyright.
[Update: Can't find the picture any more.
The presentation (slides with voiceover) referred to in the title gives me a much better flavor for Jay's perspective than I ever had before. Interesting combination of resources.