REALISME: real time integrated software methods adapted to ESA's needs

Space systems development is becoming more and more critical due to the complexity of the industrial organisation, the increase in technical complexity, the criticality of the functions to be supported, and that in a more and more competitive environment. Within these developments, software is playing an increasing and more central role. This leads to new or stronger constraints on the software. Because of this, the European Space Agency (ESA) has already conducted several studies, e.g. HOORA (Hierarchical Object Oriented Analysis), HOOD (Hierarchical Object Oriented Design) and ESSDE (European Space Software Development Environment). This report describes the results of the REALISME project, which aims to propose a consistent approach for real-time software development, integrating the existing (object oriented) methods for analysis and design. The emphasis is on providing clear and ready-to-use guidelines, based on existing methods.