Complexity-oriented design of cyber-physical systems

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In the development of new products companies try to satisfy individualized customer requirements with an increased number of product variants. These product variants are not only realized in the physical domain, but increasingly through the interlinkage and communication between products and processes and the use of different networks and platforms. Such an extension of a physical system is referred to as a cyber-physical system (CPS). These systems are characterized by the interlinkage of real objects and processes with information processing objects and processes through information networks. By these means they are enhancing the interplay of physical and software systems. However, the connection of physical and virtual objects contributes to a higher complexity of CPS compared to physical products.The analysis of the current state of research exhibits a deficit in the overlapping area of the design of CPS and the measurement of complexity. In order to consider complexity in the design of cyber-physical systems, suitable descriptive and explanatory models are missing.Taking into account the increased complexity of CPS it is the overall goal of this research proposal to develop a model that enables the design of CPS with an optimal cost-benefit relation. To achieve this goal the system complexity which has an essential influence on the cost-benefit ratio will be used as measurement and control variable. Through the measurement of complexity inefficiencies will be detected and correcting measures will be derived. At the same time complexity can be used in parts of the system where it substantially contributes to customer value.The research project can be structured in four partial models. In the first step, a descriptive model taking into consideration complexity-inducing dimensions will be developed. Subsequently, an explanatory model for the structured analysis of complexity drivers and interdependencies in CPS will be derived. To quantify complexity and its effects in cyber-physical systems indices will be developed and transferred into a system of indicators. In the last step, the system development will be supported by a model that enables the derivation of measures for a complexity-oriented design of CPS.The planned research proposition contributes to a better understanding of the complexity of cyber-physical systems. The research will be validated by applying it in different industries. To facilitate the transfer of results a software demonstration tool will be provided.