OTBI: The reports and dashboards are developed directly from source tables and the data is real-time. Modifications to these reports and dashboards require a developer.
OAC: The reports and dashboards are developed using data that has been extracted from the source system, transformed, and loaded into data warehouse tables before being used in reporting tools. The reports and dashboards developed in this tool have self-service options so consumers can modify, slice, and dice the data, and save versions of reports to their own folders (titled ‘My Folder’) in the catalog.
(The data in OAC is not real-time, and there is versioned data available for student data. Some modifications in OAC may require a developer.)