This document discusses approaches to service systems design. It first provides theoretical background on related fields like service science, enterprise architecture, and service design. It then discusses Richard Buchanan's four orders of design. The document introduces the concepts of service systems and service ecosystems. It presents methods and models used in service systems design research. Finally, it discusses three research questions around facilitating MyData-based service systems, digital legal design for data sharing, and developing a customer-centric approach to enterprise architecture and ArchiMate modeling.