Redundancy

The desired or undesired duplication of data within a data model. Effective data warehouses implement controlled redundancy to affect improved data accessibility.

Retention

Defines the period of time that the data is to be maintained in the database before being considered for archival, roll-up, or deletion.

Retention

Refers to the act of keeping data in the DW over a specified period of time.

Roll-Out

To implement in the field or make available to end-users.