Production ramp-up is becoming increasingly important for industries. The urge for innovation pushes firms to constantly launch new products on their market. Therefore New Product Development and its final phase, the production ramp-up, can no longer be considered as rare events. In this paper, our research aims at gaining knowledge about the production ramp-up through the analysis of major problems encountered during this production phase. Based on an industrial case of a product transfer project, we studied the ramp-up phase, gathering a list of problem statements. These problem statements are then organized in classes, giving characteristic problem types. A further study of these problem types gives the opportunity to have a better understanding of current ramp-up phases but also helps better organizing future ones in up-coming New Product Development projects.