How do you develop body NVH targets and allocate contributions to subsystems?

Body NVH target development involves: Benchmarking competitive vehicles for interior noise, vibration, and harshness across operating conditions, defining vehicle-level targets (interior noise at various speeds, shake, boom), cascading to body-level metrics (panel damping loss factors, modal frequencies, transfer functions), and allocating contributions to subsystems (body structure, closures, sealing, powertrain, suspension). Analysis uses SEA (Statistical Energy Analysis) for high-frequency, modal analysis for low-frequency. Target allocation considers technical feasibility, cost, and weight implications. The body team receives targets for stiffness, damping, and acoustic isolation that ensure vehicle-level requirements are met when integrated with other systems.