Large companies are increasingly demanding better performance in sustainability indexes in their value chain. However the majority of suppliers are small and medium sized companies that find it difficult to measure and consequently report sustainability indexes. For this reason CEBDS, partnering with Global Reporting Initiative (GRI), developed training geared to the development of sustainability reports for small and medium sized suppliers to the companies associated with CEBDS. In addition to the conceptual part of the report process, training includes case studies and practical simulations.