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Overview of an Anomaly

  • An Anomaly is an anomalous data set (record or column) that asserted false to applied data quality check(s). Both Inferred and Authored Checks generate Anomalies, and are batched together when applied through a Scan Operation to highlight anomalies:

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There are two types of anomalies in Qualytics: Record and Shape:

  • A Record Anomaly is at the record-level, where a specific field or a combination of fields are anomalous.
  • A Shape Anomaly is at the column-level, where a field's shapes and patterns are being impacted at a higher level.

Note

In either anomaly type, source records are exposed as part of Anomaly Details. A Record anomaly will highlight the specific record, and a Shape anomaly will highlight 10 samples from underlying anomalous records.

  • Shape Anomaly view

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  • Record Anomaly view

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  • When a Scan is run, Qualytics will highlight anomalies with the following information:

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    1. Table/File: the Table or File of the anomaly
    2. Field: the field(s) of the anomaly
    3. Location: fully qualified location of the anomaly
    4. Rule: Infered and/or Authored checks that failed assertions
    5. Description: human-readable, auto-generated description of the Anomaly

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    1. Status: The status of the anomaly. If it's active, acknowledged, resolved or invalid
    2. Type: Record or Shape
    3. Tag: tag(s) / label(s) associated with an anomaly
    4. Date time: date/time when the anomaly was found

Note

The New message means this is a new, active anomaly that has been found as part of the latest Scan Operation.

Status

  • The Anomaly Status can be set to Active, Acknowledged, Resolved and Invalid. While this enables users to better maintain a worklist through anomalies, it is also a mechanism of providing feedback to the system. Specifically, learning methods are tuned according to the feedback provided by the user - invalidating an anomaly will mean that the tolerances of the checks that caught the anomaly will be updated going forward.

    1. Active: The anomaly is active and needs to be addressed
    2. Acknowledged: The anomaly is valid, has been acknowledged but kept active in the Anomaly worklist
    3. Resolved: The anomaly is valid and has been resolved, therefore removed from the Anomaly worklist
    4. Invalid: The anomaly is not valid, removed from the Anomaly worklist and rules updates are suggested to inference engine.
Last update: April 27, 2024