As a minimum, which of the following user rights are needed to initiate a Related Action?

To initiate a Related Action, a user must have specific access rights to ensure they can interact with both the record and the process model associated with that action. Viewer rights to the Record are necessary because the user must be able to see the information contained in that record to initiate an action based on it. Additionally, Initiator rights for the Process Model are required since these rights allow the user to start the process associated with the Related Action.

This combination of rights ensures that the user not only has visibility over the data they are working with but also the ability to trigger the processes that may involve further actions or workflows related to that record. Without either of these rights, the user would not be able to initiate the Related Action effectively.

The other options do not provide the complete or required set of rights. For example, having only editor rights to the record or admin rights does not guarantee the necessary permissions to start a process, while merely having access rights to data does not indicate sufficient permissions over the record or process model itself. This combination of viewer rights and initiator rights is specifically tailored to support the functionality needed to execute Related Actions in the Appian environment.