There is an abundant literature regarding supplier development in collaboration withbig companies. Nowadays, Small Medium-sized Enterprises (SME) are growing innumber and there is not much research in collaboration with them regarding supplierdevelopment. This thesis contributes to Lean supplier development with the purposeof testing two potential processes for supplier development for Small Medium-sizedEnterprises as well as some barriers and success factors. The aim is to check theapplicability of the two extracted supplier development processes, potential barriersand success factors for SMEs. A framework was made to categorize the barriers andsuccess factors and their connection to SMEs was considered. A case study wasconducted for this purpose and the data was gathered through semi-structuredinterviews in a qualitative manner.The two potential processes for supplier development for SMEs are validated throughthis research with some variations. Potential barriers and success factors arediscussed, and their validity and applicability to SMEs are analyzed and discussed inChapter 6. Two new barriers for supplier development discovered by this research, ITas a barrier and Language as a barrier. For further research others can identifyunderlying reasons for big suppliers engaging in supplier development with SMEbuyers, especially for cross-border suppliers.