1. Introduction.- 2. Is Engineering Design Disappearing from Design Research?.- 3. Methodical Support for the Development of Modular Product Families.- 4. Risk-Driven Design Processes: Balancing Efficiency with Resilience in Product Design.- 5. Methodology and Computer-Aided Tools - A Powerful Interaction for Product Development.- 6. A Reuse Design Decision Support System Based on Self-Organizing Maps.- 7. Increasing Effectiveness and Efficiency of Product Development - A Challenge for Design Methodologies and Knowledge Management.- 8. Design Theory and Methodology - Contributions to the Computer Support of Product Development/Design Processes.- 9. Summary - Specific Ways to Further Develop Design Methodology.- 10. Boundary Conditions for a New Type of Design Task: Understanding Product/Service-Systems.- 11. Product/Service System Design and Beyond.- 12. Open Product Development.- 13. Managing Virtual Product Creation.- 14. Systems Engineering Versus Design Methodology.- 15. The Autogenetic Design Theory - Product Development as an Analogy to Biological Evolution.- 16. Towards a Designer-Centred Methodology - Descriptive Considerations and Prescriptive Reflections.- 17. A New Perspective on Product Engineering Overcoming Sequential Process Models.- 18. Summary - Holistic Ways to Supply, Extend or Replace Design Methodology.- 19. What Designers Can Learn from Leonardo, an Ingenious Artist, Scientist and Engineer.- 20. "Design ... but of What"?.- 21. Transferring Design Methods into Practice.- 22. Towards a Taxonomy of Design Research Areas.- 23. Design Research and Education: A University Perspective.- 24. The Future of Design Research: Consolidation, Collaboration and Inter-Disciplinary Learning?.- 25. Summary - General Reflections on Design Methodology.- 26. Conclusions.