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Purpose -This paper aims to clarify emerging aspects and trends of Six Sigma literature over 17 years, from 1992 to 2008. Design/methodology/approach -The literature on Six Sigma from 417 referred journal articles in business and management disciplines, information systems and computer science, engineering, healthcare, etc. were systematically analyzed based on a scheme that consists of four distinct dimensions: publication year and journal, major themes, research type, and application sector (i.e. manufacturing vs service). Findings -A number of key findings emerged: Six Sigma research is growing rapidly, covering various disciplines and domains with a great focus on Six Sigma tools and techniques; empirical research is dominant with more emphasis on case study approach; and the growing gap between manufacturing-and service-focused articles implies the return of Six Sigma to manufacturing as its initial base. Although a large volume of literature is available on Six Sigma, the topic is still under development and offers potential opportunities for further research and applications. Originality/value -The paper provides both academics and practitioners with a useful framework for pursuing rigorous Six Sigma research through explaining the chronological growth of Six Sigma, challenging themes of Six Sigma research, dominating research types and application areas in Six Sigma, and the major sources of Six Sigma information.

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Purpose This study aims to predict the impact of utilitarian and hedonic motivations on using enterprise social network (ESN) systems for sharing internal and external knowledge, as well as their effects on employee productivity. Design/methodology/approach Responses of 115 ESN system users from a wide spectrum of firms have been validated and analysed by means of structural equation modelling using partial least squires (PLS-SEM) method. Findings The results indicate that using ESN to share internal and external knowledge has a positive significant impact on employee productivity. Surprisingly, empirical analysis reveals that using ESN tends to be significantly influenced by hedonic rather than utilitarian motivations. Originality/value The study is an early empirical attempt that examines using ESN for knowledge sharing, emphasizing its upstream motivational influence and downstream business impact. It also offers managers and ESN vendors a frame of reference to maximize the use of ESN in the workplace to boost employees’ productivity within various contexts.

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