Displaying MM Customizing – Workflow Role Resolution (5) 
Use
To create the link from the release procedure to the workflow, you first need to define certain release codes as relevant to the workflow. The following table contains the reference to a user. When a purchase requisition is due to be released, this user receives a relevant workflow item in his/her inbox. The release can be performed directly from this workflow item. After the release the initiator of the purchase requisition receives a corresponding message. The allocation of workflow items to users occurs according to release group, release code, and plant. If you want to use other criteria to find a user to receive the workflow item, you can implement user exit M0B00001.
Procedure
In the Choose agent type dialog box, the system suggests single users (US) and also other types of recipient of workflow messages. Using these types you can refer to complete organizational units stored in the HR component of the R/3 system. For this reason, the system shows the key for the selected HR organizational unit and not the specific user IDs in the Agent ID column.
The user identified by the table entries automatically receives a message via the workflow, informing him/her that a purchase requisition with the relevant release code is ready to be released. In our process, the assigned user WF-MM-3 is identified using release code KY in plant 1000 (Europe) and in plant 3000 (North America). You will need this user later in the process for the second level release.