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Chapter 8. DATA CROSS-REFERENCING PROCESS > DATA REDUNDANCY AND VARIABILITY
DATA REDUNDANCY AND VARIABILITY
An indication of the redundancy and variability of disparate data can be determined after data cross-referencing has been completed for a segment of the disparate data resource or for the entire disparate data resource.
Data Redundancy
When data cross-referencing has been completed for a segment of the disparate data resource or the entire disparate data resource, the data redundancy can be evaluated. Data redundancy was defined in Chapter 4 as the unknown and unmanaged duplication of business facts in a disparate data resource. It's the same facts, for the same data occurrence, for the same time period. It's the situation where a single business fact is stored in more than one location, and the locations may not be in synch. Data redundancy is typically determined for data files only.