He initiated the development of The mixing and application System that grew to become the NetWeaver System.[one] Netweaver's layout would wrap SAP apps in an architecture that allowed integration in an company and on the internet with other firms. The System leverages SAP portal ideas 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/