Purpose: The purpose of the current study is to examine the utility of Six Sigma interventions as a performance measure and explore its applicability for making the training design and delivery operationally efficient and strategically effective. Design/methodology/approach: This is a single revelatory case study. Data were collected from multiple sources. In depth interviews of Six Sigma champion, black belt and green belt executives were conducted for understanding the Six Sigma interventions in HR function in general and in training functions in particular. Findings: Application of Six Sigma approach was found to be helpful for better alignment of training function in MNC bank with the organizational requirements. Six Sigma changed the role of the function towards proaction. Research limitations/implications: This study has usual limitation of single case study research. Moreover, the impact of Six Sigma and its dependence on organizational structure, organizational culture, leadership role, social embeddedness, role stress etc. are identified as areas for future research. Practical implications: The study brings out the applicability of Six Sigma approach for HR department and training function. Originality/value: The paper delineates the application of Six Sigma approach in training function. It explores the applicability of this approach to ensure the training effectiveness by pulling the training function closer to internal and external customers' requirements and by its strategic alignment with organizational goals. (Contains 1 table and 5 figures.)