This Ph.D. thesis on the topic of smart product-service systems (PSS) engineering peruses the goal of integrating the processes of service and digital infrastructure development and connecting the development processes of related products, thereby providing an overall framework for smart PSS engineering endeavors. A methodology for application in PSS development projects, covering the stages of business-model analysis and specification, conceptual PSS design, detailed service and digital infrastructure design, and design validation and testing is proposed. It comprises two abstraction levels for consideration of the PSS development endeavor: A macro-level is concerned with the overall development process, the PSS typology, and enterprise-wide integrated IT landscape. This level aims to establish an overall understanding of the development endeavor among stakeholders, set the conceptual model for PSS consideration, and guide the overall development process. A micro-level concerned with the design of the services and digital support infrastructure of the PSS and the provision of connection paths to associated product development processes provides a process definition for system analysis and design synthesis, a concept based on an ontology, views, viewpoints and a metamodel for system representation in the SysML language, and prototypical integrations for modeling support in professional tools. The applicability and suitability of the methodology are demonstrated with the help of a fictive case study of an Autonomous construction site PSS. The study includes the PSS modeling and the exemplary implementation of service processes based on digital twins of the system and its process-relevant elements in an industrial IoT solution functioning as the PSS operating system.weiterlesen