Role Resolution Using Evaluation Paths 
Use
The organizational situation of employees within an enterprise is depicted in the organizational plan. Using this existing information, you can perform role resolution starting from one particular employee to determine one other employee, or several other employees, along specific relationships in the organizational plan.
The following role evaluates a function module to perform resolution. Please note that this function module is provided by SAP as a default.

Starting from a particular employee, you want to determine his or her organizational unit so that you can address a work item to all of the employees in this organizational unit.
The role that includes this functionality is available in your system and can be used as an explanation of this documentation. For more information, see the role used to
Integration
From a technical perspective, this role resolution is very similar to
Role Resolution Using a Function to be Executed. The RH_GET_STRUCTURE function module must be used; an evaluation path is also specified.Activities
This step is only required if you cannot use any of the roles delivered in the standard system. For more information, see