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Abstract
There is a trend, both at national and European levels, towards the use of standards in hardware, software and communications. This implies a common root for the design of unified databases which will result in the homogeneity and interchangeability of data and knowledge. The technological solution exists and is imposed. The problem then is not the tools to be used as information support but how this information is organized and structured. According the the standards proposed by the Plan de Dotacion Informatica para la Asistencia Sanitaria (DIAS) [1], and with respect to the problem of computer coverage of specialties, we present in this work an entity-relation model for a generic service within our project of integrally computerizing a tocho-gynaecology area. It is a multidisciplinary job between doctors and physicists where we use a planning strategy in order to identify the functions, processes and activities, making the traditional clinical management structure compatible with the one proposed. This means that if we want the introduction of the system to be effective, we have to make all the clinical and sanitary staff participate in the project. We must induce the need for change and carry out the process of change gradually, so that only a change in the support, and not in the organization, is initially perceived.