Security access (None, Read, Write) is assigned to members of dimensions. As an administrator, you define which dimensions have security.
By default, security is enabled for these dimensions.
The default security access is None.
You can disable security for any of these dimensions, but security is mandatory for at least one dimension. You can assign security at a parent level for all of its descendants, and you do not need to assign security to each dimension member independently.
Data level security is based on the intersection of the security access to each dimension. The most restrictive security access is the one used by the system.
For example, security is assigned to Scenario and Entity. A user has the following access to individual members of the dimensions:
Actual - Write
Budget - Read
UK - Write
France - Write
With the above access, the user can enter and load data to Actual/UK, but has Read only access to Budget/UK and Budget/France.