Account Groups are used to define sets of General Ledger Account Id's for use in assumption calculations and cost roll-ups.  Although Account Groups are generally user-defined, there are a few groups required by the System in order to function properly.  Account Groups and their associated properties are viewed and defined in the Assumptions tab of the main window.

Assumptions Tab - Account Groups

Assumptions Tab - Account Groups

hmtoggle_plus1Account Group Names
hmtoggle_plus1Account Group Properties