In this licentiate thesis studies how a systematic work of implementing a supported housing develops from idea to practice with the purpose to analyze collaboration and its impact on the development of the implementation. The study followed how the four organizations created a collaboration to implement a supported housing.; the social services in Kalmar municipality, the Swedish Prison and Probation Service in the form of the local probation service in Kalmar, the association KRIS (Kriminellas Revansch I Samhället, [Criminals' Revenge In Society]) in Kalmar and Kalmarhem AB a housing company,  The starting point for the study consists of a process evaluation of an implementation process, how collaboration established between the organizations, how collaboration as a way of working affects the process and finally the split-up of the project. The study conducted in two parts: partly during the years 2006-2008 when implementation studied, partly during the years 2014-2015 when the split-up of the project studied. The methods used was interviews, participatory observations and document studies. The empirical evidence collected during the two periods forms the basis for the analysis. The results indicate that collaboration created between the actors of the implementation is of crucial importance. That is, how the actors confronted and solved the problems that arose during the implementation and that both time and various forms of resources are required to create a comprehensive collaboration.  The concluding part of the study describes how a split-up of collaboration takes place. The change can attributed to a new arrangement with clear operational management in accordance with the impact of New Public Management [NPM]. A consequence for the supported housing, in line with this logic, was a separation and division of clients and contractors and division between businesses in accordance with a competitive mindset. At the time of writing, the supported housing remains, albeit in a different form. One explanation is that during the implementation, a close and sustainable collaboration was developed that could withstand some of the threats created through changed forms of governance. This indicates that the collaboration that developed between the four organizations can still provide some space if it is able to find forms that can fit into new control logics.