He initiated the development of the integration and software System that grew to become the NetWeaver System.[one] Netweaver's structure would wrap SAP applications in an architecture that allowed integration in an business and on the internet with other companies. The System leverages SAP portal concepts and software architecture principles from https://www.ecom-group.com/training-events/case-study-apply-the-sap-enterprise-architecture-framework-along-an-architecture-development-cycle-iea10/