The link below contains many articles, whitepapers and analytst reports about Data warehousing. You should find some interesting materials:
http://www.teradata.com/library/default.asp
Nuffsaid,
Great questions... glad to see a business person willing to question IT. I recommend picking up the book "Secrets of the Best Data Warehouses in the World" by Tom Coffing. Also, this web site has some general info on data warehousing that you might find useful...
Have you done in any research on the "business value" costs of building data marts? Like... not being able to answer business questions/queries due to disparate data? Or the cost of replicating data in various marts so business questions can be answered?
Try this Gartner article on...
Few questions: Why & how do you plan to use Oracle for a terabyte sized warehouse? Do you plan to have more than 5-10 simultaneous users? Aren't you concerned about growth limitations & bottlenecks? I didn't know Oracle scaled to those limits - can you advise on how you made the decision...
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