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The characteristics of vibration in the seat system are presented using the analysis of Finite Element Method (FEM). The Noise, Vibration and Harshness (NVH) performance should be managed from the viewpoint of tactile, acoustic and visual sense. Tactile response is the response of sub-systems, which is induced when the human body contacts steering wheel, footrest and seats. The seat modeling techniques have been developed and correlated with the modal test. The main modes in the seat system were analyzed and these seat modes were used to set the mode map (seat target) at the stage of full vehicle level. The sensitive region on seat mountings was defined through the design sensitivity analysis. Weight down design studies were performed.