Six Sigma: an evolutionary analysis through case studies

Purpose – Between 2004 and 2007, the Argentinian Institute for Quality conducted an investigation exploring how Six Sigma practices evolved within a set of organizations. The goal was to determine which variables influenced this evolution and the relative weight of critical success factors as the methodology matured. This paper aims to investigate the results of this study. Design/methodology/approach – The methodology followed was a qualitative study of multiple cases thorough interviews with key players in the organizations that agreed to take part in the investigation. Findings – The study found a complex landscape that makes it difficult to speak about a “one size fits all” definition of Six Sigma, particularly years after the initial deployment. Moreover, certain interactions between factors are summarized, showing how some of the case companies were able to cope with their negative effects. Originality/value – The results of the study could be beneficial to assess the situation of Six Sigma within an organization and the obstacles and issues that could appear as the initiative evolves.