Vehicle NVH performance target setting and cascading

A: That's the most common mistake — treating the number as absolute instead of conditional. NVH targets are only valid under the defined operating envelope. If speed, surface, or load drifted, you're not validating cascade effectiveness, you're just collecting noise.

A: That's the most common mistake — assuming it's about convenience. Fixed mic locations exist so vehicle-level targets can be decomposed and traced back. If locations float, cascade math and correlation collapse fast.

A: That's the most common mistake — blaming structure when the BIW data is clean. A cascade error that underweights airborne contribution will pass modal checks and still miss cabin SPL right where openings dominate.

A: That's the most common mistake — overthinking the structure. Wind noise targets live and die on sealing performance, and compression set quietly erodes the cascade long after SOP.