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The Return on Investment of Data Warehousing This paper will show the yield on investment (ROI) of data warehousing (DW). The history of data warehousing relies upon the definition and deadline. Afterward, detailed information regarding return on investment will be discussed. After, will be information about data warehousing brand new technology of hardware and applications. Data Warehousing is a new expression in my section in which we utilize the Network Appliance (NetApps) Netfiler storage devices/units. The information read was very informative and useful in my understanding data warehousing much better. Finally, a conclusion about the return on investment of information warehousing. Based on Ralph Kimball's article, www.dwinfocenter.org/defined.html, "a data warehouse is a copy of transaction data specifically structured for querying and analysis." The writer has two quibbles with the Ralph's definition and they are: "1) occasionally non-transaction information are saved into a data warehouse В-- though likely 95-99% of the data usually are trade information and 2) data and reporting rather than "question and analysis" since the primary output from data warehouse systems are either tabular listings (questions) with minimal formatting or exceptionally formatted "formal" reports." "Queries and reports generated from data stored in a data warehouse may or may not be utilized for analysis." The author says, "he particularly like about Ralph's definition is exactly what he doesn't say that is the kind of the saved data has nothing to do with whether a thing is a data warehouse." A data warehouse can be normalized and de-normalized. This is a relational database, multidimensional database, flat file, hierarchical database and item database. Data warehouse...