Mohamad Reeduan Mustapha, Fauziah Abu Hasan, Mohd. Shaladdin Muda, Isomorphic Factors for the Adoption of Lean Six Sigma in Malaysia, Journal of Engineering and Applied Sciences, Volume 12,Issue 24, 2017, Pages 7633-7639, ISSN 1816-949x, jeasci.2017.7633.7639, (https://makhillpublications.co/view-article.php?doi=jeasci.2017.7633.7639) Abstract: This study is to investigate the adoption of Lean Six Sigma (LSS) using institutional theory as a conceptual framework. The rationale for this study is to provide a complete understanding of LSS adoption, moving beyond the traditional technical and economic perspectives. This study was conducted through interviews, meetings and observations which were based on the researcher’s findings and experiences. Qualitative interviews were carried out with four Black Belts and one Master Black Belt practitioners at global companies across a range of industries which operate in Malaysia. From the interview, the mimetic and normative pressure was found to be the motivation behind LSS adoption. Though, the normative mechanism also played its part during the implementation of LSS. The research has been carried out through multiple case studies which contribute to a better understanding of the whole process of LSS adoption using institutional isomorphic theory. Keywords: Lean Six Sigma;isomorphism;qualitative;Engineering management;Malaysia