New to Analytics 15.2 release is the addition of historical facts and subject areas for user defined fields fact data such as project, wbs, activity, resource, and resource assignment for their cost
and number udf's. For these UDF's to be available they will have had to been selected either from configStar or from the Analytics web configuration utility and have the UDF's and opted in.
Opting them in means that history will now be recorded on them. History is captured at different intervals depending on the object.
Because Resource is a global object, the history interval is always set to Week.
For Activity and Resource Assignment UDF's they will be turned on for daily capture based on the setting on the Project associated with this object. The project will need to be opted in with activity daily
history and then so will these UDFs for these objects.
Project and WBS history interval will also be determined by the history interval setting set on this project for the Project\WBS history setting. The lowest level of granularity here is Weekly.