The research problem of this report has been to characterise the relationship between supplier and customer in a business-to-business market. The research problem has been further developed in forms of two research questions dealing with the present stage of the relationship lifecycle and factors affecting the stages in the relationship lifecycle. The specific company that has been under investigation is Casco products and a few of their customers. The method used has been personal interviews with ten of Casco’s customers. All information has been collected via an interview guide that has been presented in advance to all selected respondents. The study has been of a qualitative nature. The conclusion is that there are ten factors that affect the commitment phase in a relation, although all factors might not be applicable to all industries. Another conclusion is that a relation develops over time and that the model of relationship development isn’t developed to fit all industries perfectly.