Abstract: This paper reviews the state of the art in the vibratory localization of mistuned bladed disks in the past three decades with regard to modal localization and response localization. Blade-to-blade variations (called as mistunings) in their geometry and structural properties occur during the manufacturing process and/or as a consequence of in-service wear. Although small under certain conditions they may localize the vibratory mode and confine the response to a region near the source. Since mistunings can re...