During the years 2016-2019, Malmö University conducts an independent quasi-experimental evaluation of the drug prevention method called Öckerö method. Part of the evaluation aims to ensure how the method has been implemented in the four intervention municipalities during the project period. This is what our bachelor thesis aims at describing. We will try to explain the first year of work on the Öckerö method by conducting a qualitative survey using semi-structured interviews to collect data. What we are examining is the project coordinators' perception of the method and its purpose and how they performed the work on the various core components. To enable a comparative analysis of the purpose, the founder of the method, Håkan Fransson, is also interviewed. The data is processed based on implementation theory explained by both Lennart Lundquist (1987) and Everett Rogers (2002). The results compare, among other things, the implementation of the different components of the method as described by the project coordinators in the intervention municipalities, interpreted by us. The result shows that the purpose is often described uniformly but that the performance of the core components differs between the intervention municipalities. At the same time, the method is described by the founder as flexible and adaptable to the municipality's best abilities and needs, which can explain the large degree of differences in performance. The fact that the performance of the various components has differed between the municipalities causes an analysis of how vague instructions can create scope for action, but also a difficulty in implementation. It further means that a discussion about program integrity becomes relevant as the term aims to describe whether the components of the method were used in whole or in part. Because the purpose is perceived equally, but the performance of the components differs, it becomes difficult to determine whether program integrity can be considered to be achieved.