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Almost all professionals in a hospital need a vast amount of information. At the beginning of the 21st century it has become clear that efficient information processing and appropriately applied information and communication technology (ICT) is essential for the quality of patient care and for the quality of hospital management. Hospital information systems have to fulfill these information needs and have to support lean processes for patient care. The costs for information processing are also considerable and make up a significant part of a hospital's budget. This holds for the computer-based part of a hospital information systems and for conventional ICT-tools It has become obvious that efficient information processing offers a vast potential for cost reductions. On the other hand, inefficient information processing will lead to cost increases. The intention of this talk is threefold. First, we will try to give an overview on the state of the art of hospital information systems. In addition we will report about a 'Requirements Index for Information Processing in Hospitals'. The index is used as an example to point out how quality of information processing can be assessed and how strategic decisions for ICT management can be derived. Finally some thoughts about a human-centered, holistic theory of information systems architectures are presented.

Information Processing in Hospitals: State, Requirements, and the Need for a Modern Theory of Information System Architectures