The purpose of this dissertation is to structure Design Management System (hereafter, DMS) model by suggesting a new empirical analytical method in the study of design management key success factors (hereafter, KSF) performance evaluations to overcome limitations of the previous studies, most of which mainly literature surveys and factor analyses of successful companies in the design management and to meet the changes in the environment of design management. Our research tasks to suggest a new method of analysis to evaluate KSF performances are follows: