Live webinar SUM: the tool for System Conversion to SAP S/4HANA Feb 14, 2018 The Software Update Manager (SUM) is the tool for the technical conversion of the scenario System Conversion to SAP S/4HANA. In this session, we provide the context how the SUM is used, which dependencies exist to other conversion tools, and which tasks the SUM is executing. Presented by Dr. … This content is only for paying members. Are you a member yet?. Click here to login. Do you want to become a member?. Click here to register.