Software engineering products are becoming ever more complex, because software is being used in the solution of more technically difficult problems and because the size of software projects continues to grow. A key question for software engineers is how to cope with this complexity. There is no single answer, and software engineers must attack the problem from a number of perspectives. A technical perspective reveals new paradigms for system development, including two paradigms that show particular promise: object-oriented design and formal methods. A management perspective recognises that good project management is vital to the success of a complex project. The scale of modern projects makes it essential to use automated support, so software engineers must also look at how to manage complexity from an automation perspective. Automated support can come in the form of discrete tools for particular tasks, or a packaged set of tools in a support environment. The papers in this book address the problem of managing complexity in software engineering from these different perspectives. The papers are grouped into three sections: Paradigms of software development; Project management; and Automated support. The papers are selected from those presented at the 4th European Seminar on Industrial Software Technology organized by the European Workshop on Industrial Computer Systems (EWICS), whose aim is to promote the effective use of industrial computer systems through education, the dissemination of information and the development of guidelines and standards.