Hierarchy filtering is a one-step way to block users from viewing data that they shouldn’t have access to. When the hierarchy filtering system preference is enabled, employees can only view, add, or edit users or projects within their own department and its sub-departments.

For example, if hierarchy structuring was enabled for a company with the department structure illustrated below, a member of the R & D department would only be able to access users and projects located within the R & D, Quality Assurance, Development, and Project Management departments.
 

department hierarchy
 

Refer to About Hierarchy Filtering in Replicon's online help for more detailed information on this option.