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DEMO is a methodology for designing and engineering organizations which is mostly used for Information System Development (ISD) and redesigning the business processes. DEMO has the ability to reduce the complexity of an organization by providing an ontological model of that organization. Although DEMO has promising advantages and has provided successful outcome in practice, it hasn’t received the deserved attention from The individuals in practical fields. While many of the competitor methodologies are more successful and accepted among the practitioners, DEMO is at the risk of being forgotten among all other methodologies in the methodology jungle. It seems trivial to use effective tactics to increase the acceptance of DEMO among individuals in practice. These tactics can only be effective if they take the reasons behind this specific point of view about DEMO into account. Various factors from a technical anomalies to opinion of others can influence the perception of people about a methodology. While the acceptance of DEMO by people in practice is very important in the success of the methodology in practical fields, no research was found in the literature that the statistics on reports the adoption rate of DEMO in practice and identifies the reasons behind certain adoption behavior. Therefore, alongside providing such statistics the main goal of this thesis is to identify the factors that can determine certain behavior towards DEMO and propose recommendations to increase the adoption of DEMO based on these factors. We conducted this research in three phases: Theoretical, Quantitative and qualitative analysis. In theoretical analysis we have identified the factors that were proven to influence the adoption of other methodologies. In quantitative analysis we have tried to find out whether these factors have any influence on the adoption of DEMO. At the end, we captured the actual experience of the individuals in practice with DEMO. In this research we were able to identify several factors that influence the adoption of DEMO. We realized that the support of DEMO by management, coworkers, other individuals with the same skills as the individual and the eagerness of the individual to keep him self updated about DEMO can increase the adoption of DEMO to a great extent. Furthermore, uncertainty one’s position in the organization has a negative effect on the adoption of DEMO. Finally, the ability of the methodology to produce results in a way that can be communicated with all the individuals with different levels of knowledge about DEMO is also influencing the adoption of DEMO.