In IS practice as well as in the literature, IS development methods are prominently espoused. IS development methods are used around the world and globalization of business stimulates their harmonization. To our knowledge, no empirical research has been reported regarding the effect of national cultures on the actual (non-)adoption of IS development methods, which is the focus of this research project. The study is based on Hofstedes well-known research (conducted within IBM), which has provided a conceptual foundation for cross-national research over the past two decades. Data encompassing approximately 40 countries were collected within one global consulting firm. The outcomes of this study are expected to have implications for how global organizations can introduce new development methods more effectively.