Data-Oriented Reengineering

Today, information system evolution primarily §consists of extending the information systems and §migrate them to modern platforms. This book tackles §the problem of understanding and adapting §information systems based on the §systems data and their interdependencies. In this §context several methods and tools have been proposed §for a reengineering process. Since legacy systems §have grown over years and lack sufficient §documentation, reengineering is a complex and hard §task. Tool supported reengineering approaches and §processes reduce the complexity and risks during §information system maintenance. Still, reengineering §approaches and tools often tackle only specific §system parts or dedicated maintenance aspects. The §approach presented in this book overcomes these §limitations by providing processes that combine §tools for reengineering the data as well as the §applications. The focus is to handle uncertain §knowledge by sustaining human exploration and §iteration during tool supported reengineering. In §practice uncertain knowledge during reengineering §plays a fundamental role but it is often neglected §by exiting approaches due to idealistic assumptions.