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Data Warehousing

The typical Information technology organization supports an environment that was built over time, with computer applications that were designed to support the day-to-day operation of the company's primary business. There are separate applications (or computer systems) for several categories of use. Some are centralized systems, used for back office functions such as financial, payroll, and general ledger updates. Others run in localized environments, such as those for field office, personnel, and sales and marketing initiatives. Still others are run in multiples—every branch running it's own version. Order processing and customer information storage systems might fall into the category of multiples.

Often these different applications are built on differing platforms by many separate development teams, without a “city plan” or architecture for fitting them all together. Each department just does their own thing, without worrying about what other departments are doing.


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