Data Quality

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C H A

P T E R 2 Definition of Accurate Data

]1,

Missing and

invalid values

Valid but

wrong values

Correct

values

Discovered

,

I

Correct

v- I values

Discovered

F I G U R E 2.3 Effects of improvements.

a much bigger improvement has actually taken place. Figure 2.3 indicates

cross-correlations in terms of the effects of improvements in the accuracy of

data values.

2.7 How Important Is It to Get Close

You can achieve very high levels of accuracy of data within a database if

enough energy and resources are applied. Although data accuracy is only one

component of data quality, it is clearly the single ...