networked as components of a global information system. Organizations, individuals and software act autonomously and are at the same time cooperatively involved in the creation of services. The planning and execution of the necessary interactions in the form of processes are not under the control of individuals. For the development and execution of processes under decentralized coordination, this work proposes an approach based on blockchain technologies. This addresses, on the one hand, the design of decentralized organizations and, on the other hand, the coordination of development that is distributed within such systems and is not centrally controlled. The thesis describes the decentralization and the model-based development of process-oriented systems from an organizational theory perspective. The focus is then on decentralized blockchain systems as development and execution platforms, with which the binding nature and integrity of transactions between a priori unknown nodes of a network can be guaranteed. The development and execution of processes are implemented on this basis using a model-based approach. This is established by an architectural framework for conceptual modeling, for cooperative modeling and for the tracking of instances. The conceptual modeling of networks, processes and instances makes use of the semantic object model (SOM) in order to map the task level of decentralized organizations to a decentralized task management level. The cooperative modeling and the tracking of instances use technologies for distributed version management in connection with smart contracts of the blockchain system Ethereum. The demonstration of the applicability of the approach based on a case study and a software implementation concludes the work. |