Explore the scientific rigor of software architecture and design practices in this 43-minute conference talk from NDC Oslo 2025. Examine what constitutes a rigorous approach to architectural work and modeling, and discover how to distinguish between rigorous and non-rigorous methodologies. Investigate the role of frameworks and models in enhancing or hindering scientific rigor in software development. Analyze whether software engineering maintains the same level of scientific discipline as other engineering fields and learn strategies for improving scientific approaches in the field. Delve into the evolution of Computer Science and understand where the scientific foundations have shifted over time, gaining insights into how to restore and strengthen the scientific basis of software architecture practices.