Dimensions describe an organization’s data and usually contain groups of related members. Examples of dimensions are Account, Entity, and Period. Financial Management supplies eight system-defined dimensions and enables you to populate up to four custom dimensions that you can apply to accounts. Dimension members are arranged in hierarchies. Upper-level members are called parent members, and a member immediately below a parent member is referred to as the child of a parent member. All members below a parent are referred to as descendants. The bottom level hierarchy members are called base-level-members.
This video demonstrates How to Manage Dimensions in Oracle HFM:
Enrol for Oracle Hyperion Trainings