Anomaly Detection Model Options

Model name. You can generate the model name automatically based on the target or ID field (or model type in cases where no such field is specified) or specify a custom name.

Determine cutoff value for anomaly based on. Specifies the method used to determine the cutoff value for flagging anomalies. The following options are available:

• Minimum anomaly index level. Specifies the minimum cutoff value for flagging anomalies. Records that meet or exceed this threshold are flagged.
• Percentage of most anomalous records in the training data. Automatically sets the threshold at a level that flags the specified percentage of records in the training data. The resulting cutoff is included as a parameter in the model. Note that this option determines how the cutoff value is set, not the actual percentage of records to be flagged during scoring. Actual scoring results may vary depending on the data.
• Number of most anomalous records in the training data. Automatically sets the threshold at a level that flags the specified number of records in the training data. The resulting threshold is included as a parameter in the model. Note that this option determines how the cutoff value is set, not the specific number of records to be flagged during scoring. Actual scoring results may vary depending on the data.

Note: Regardless of how the cutoff value is determined, it does not affect the underlying anomaly index value reported for each record. It simply specifies the threshold for flagging records as anomalous when estimating or scoring the model. If you later want to examine a larger or smaller number of records, you can use a Select node to identify a subset of records based on the anomaly index value ($O-AnomalyIndex > X).

Number of anomaly fields to report. Specifies the number of fields to report as an indication of why a particular record is flagged as an anomaly. The most anomalous fields are reported, defined as those that show the greatest deviation from the field norm for the cluster to which the record is assigned.