This paper explores and analyses supplier development in a supply chain ranging from an OEM supplier to the system suppliers (first tier), and onwards to the next level of tiered suppliers. The paper explores how Tetra Pak work with supplier development in an integrated manner involving a number of SMEs. The study is based on interviews with key actors, a survey study of involved firms as well as secondary data. The research has been funded by the KK-foundation and the Platform project at the Jönköping University