ITM 100 Lecture Notes - Data Cleansing, Unstructured Data, Data Mining

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ITM 100 Full Course Notes
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ITM 100 Full Course Notes
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Problems with the traditional file environment: data redundancy and inconsistency: Data redundancy: the presence of duplicate data in multiple data files so that the same data are stored in more than one place or location. Data inconsistency: the same attribute may have different values: program-data dependence: The coupling of data stored in files and the specific programs required to update and maintain those files such that changes in programs require changes to the data: lack of flexibility: A traditional file system can deliver routine scheduled reports after extensive programming efforts, but it cannot deliver ad-hoc reports or respond to unanticipated information requirements in a timely fashion: poor security: Management may have no knowledge of who is accessing or making changes to the organization"s data: lack of data sharing and availability: Information cannot flow freely across different functional areas or different parts of the organization.

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