Operational TPA (OTPA) is typically used as a tool for path ranking of different noise sources in a troubleshooting phase. OTPA has the advantage of not requiring laborious impact campaigns but lacks the possibility to predict receiver noise levels from testbench measurements. In this paper, we derive an OTPA method offering this “testbench to vehicle” capability. This novel, component-based OTPA method will be compared to the blocked force TPA method in a numerical test case.