I would recommend learning about early case assessment by reviewing the Wikipedia entry on ECA first. Then take a look at the article by Eric Barnum that discusses ECA with or without technology. This article is critical to understanding the attorney point of view as well as the fact that lawyers have been doing ECA for decades and it really has nothing to do with e-discovery. However, because of e-discovery, it is not a step in the litigation process that can be skipped. And finally, George Socha and Tom Gelbmann bring everything together in a recent article from Law Technology News.