To achieve pre-defined sound quality target in a cabin, the interior sound is decomposed into air-borne and structure-borne sound by using transfer path analysis. First, the air-borne sound target is cascaded to the target of each sound package component in the form of the transmission loss mainly in the analytical way. Second, for the structure-bone sound, the experimental noise transfer path analysis is extended to identify the sensitive structural path for specific frequency contents as opposed to the traditional methods with which the critical structural components are hard to identify. As a result, the vehicle sound target proved to be successfully cascaded to the component level target by applying aforementioned methods.