I set up a DMN with the Hit policy "Priority". The policy verifies the logic, however it does not provide the correct output when starting the simulation for the DMN diagram.
We don't support the Hit Policy "Priority" in the Simulation or the Test lab.
So in fact it is like this:
You can model a Priority Hit Policy, but that's all.
To support this policy , the customer must have the possibility to prioritize the output values. That's not possible with our UI at the moment. It is not planned. It is part of the standard but we don't recommend it.
KBA , BPI-SIG-PM-MOD-SIM , Simulation for SAP Signavio Process Manager , How To