If you are unfamiliar with Planning, see the Oracle Hyperion Planning User's Guide, available in the EPM Documentation Library. To open this library, from the Smart View ribbon, select the arrow next to Help, and then EPM Documentation.
If the Planning offline component is installed and configured for your system, you can take data forms offline and perform essentially the same operations as you do when connected to a Planning server. The changes that you make to offline data forms can be synchronized back to the server.
Working Offline with Data Forms