To pilot and manage their Purchases the most mature companies most often rely on their Erp, and use that of Sap in almost three-quarters (74%) of cases. According to the latest online survey conducted by Acxias, competing ERPs are far behind, with Oracle and Microsoft garnering 11% and 4% of citations respectively. While an ERP works well for direct purchases, in connection with the consumption, production and stock forecasting modules, the management of transactional processes for indirect purchases requires an approach and specific features, closer to e-commerce standards. These purchases cover very many categories of goods and services, and are generally delegated to a very large population of prescribers and end users, with very varied profiles.