Table 5.

Data quality standard system.

Dimension	Content of the dimension	Quality indicator	Rule
Consistency	Check whether the data value is in the dictionary domain	Consistency rate	Higher than 90%
Integrality	Check the completeness of the required data	Percentage of integrality	Higher than 80%
Relevance	Check the relationship between key data	Degree of relevance	Higher than 95%
Timeliness	Check the logical validity of time-type data	Timeliness ratio	Higher than 80%
Uniqueness	Check whether data duplication exists	Repetitive rate	Lower than 0.01%
Stability	Check whether the fluctuation of data volume is abnormal	Fluctuation ratio	Lower than 20%