We study the casual relationship between characteristics and effectiveness of NamDong Cluster in Incheon by using factor analysis in order to suggest, it is hoped, an alternative way to form innovative regional or national cluster. The findings of the study is that several factors such as cluster networking, collective learning, innovation synergy, localization, are critical factors to corporate performance. Also, cooperation between big enterprises and small and medium enterprises is the major influential factor so that financial and institutional supports for co-works or co-program development among enterprises are suggested.