When adding a decision criterion to a realtime decision, a Custom option gives access to the following:
When you add one of the ‘User defined’ criteria to a realtime decision, its name is editable. This provides extensibility at decision criteria; if a given criterion type is not supported, a user-defined criterion can be used to fulfill a specific requirement.
The Aggregates group gives access to the following decision criteria:
These allow you to calculate aggregates in respect of collection values stored within a visitor parameter.
•Compare frequency: this criterion type allows you to specify whether value 'A' is more frequent than 'B' in a collection.
•Frequency count: this criterion type allows you to specify the count of any value, or 'A', or 'A' and 'B' in a collection.
•Most frequent value: this criterion type allows you to specify the most frequent value in a collection.
The Custom aggregate menu also provides the ability to add a linked decision scorecard to a realtime decision, using the Scorecard option. This feature is discussed in the Linked Decision Scorecard section elsewhere in this documentation.