PurposeThis study proposes a research model to test whether Six Sigma‐based management activities improve corporate competitiveness in Samsung Group.Design/methodology/approachThe paper's model was validated and its hypotheses tested using structural equation model analysis.FindingsEmpirical results showed that Six Sigma activities do indeed contribute to revitalized process management, improved quality, and, finally, lead to corporate competitiveness.Research limitations/implicationsThe survey data were collected at the individual level, such as GB, BB, MBB, and limited to the affiliated companies of Samsung Group. To obtain more meaningful results, data would be collected at the corporate level and the pool of subjects expanded. However, this paper shows that the four fundamental factors (CEO's will, Communication, Training, and Policy) as well as three substantial factors (Information Utilization, Standardization, and Promotion) are meaningful activities influencing the success of Six Sigma management significantly.Originality/valueThe main contribution of this paper lies in the establishment of a causal relationship among Six Sigma activities, process innovation, quality improvement, and company competitiveness, as well as in the proposed managerial implications for Six Sigma projects.

Six sigma has long been used as an effective way to restructure a company's management process. A number of successful cases have been reported of six-sigma-based management activities dramatically enhancing a company's strategic performance over study periods of several years. However, while there are abundant case studies in the literature regarding six sigma, there is a lack of empirical studies that adopt statistical approaches. To fill this void, this study proposes a research model to test whether six-sigma-based management activities improve corporate competitiveness. We applied a structural equation model to 161 valid questionnaires collected from managers in a number of Samsung companies that have introduced six sigma and have been actively applying its activities for several years. Empirical results showed that six sigma activities do indeed contribute to process management refreshment, quality improvement, and finally corporate competitiveness. We hope that this study enables further rigorous studies investigating six sigma as a major strategic activity.

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