...
If multiple tests are assigned to . the same dimension, the dimensions dimension scores are averaged across the tests.
...
DQ Score Delta
The DQ Score Delta is a daily score that tracks changes between the DQ score. If the DQ score increases or decreases between each day, the DQ Score Delta tracks the difference (positive or negative).
...
Use the DQ Score Delta to configure alerts to notify key users of significant changes to the DQ score.