The aim of this study was to describe and analyse implementation of Beskæftigelses Indikator Projektet (BIP) in project Sammansatt problematik i Kronobergs län (SPiK). The questions this study aimed to answer are: What motivated implementation of BIP in the project SPiK and what factors promoted and inhibited implementation of BIP in the project? Qualitative method was used to answer the research questions, eight interviews with individuals involved in the project were conducted as well as an observation of a conference. The perspective used in the study consists of a critical realist viewpoint. The data gathered in this study was analysed through content analysis and coded through deductive coding. The results of the study showcased that implementation of BIP was inhibited by many aspects. The key aspects which inhibited implementation were the late course about use of BIP as well as the many parallel interventions being implemented in the project at the same time as BIP. What promoted implementation of this work tool was the staffs previous experience of work with the target group for the project as well as their previous experiences of work in projects.