Henrik Mårtensson delves into the origins of waterfall methodology, tracing it back to the SAGE project in the 1950s.Waterfall methodology was not invented by Winston Royce but emerged as a formal methodology post the SAGE project.Henrik challenges the mental models that perpetuate waterfall thinking in modern organizations.Outdated mental models like Frederick Taylor's scientific management principles contribute to the persistence of waterfall approaches.Henrik emphasizes the importance of systems thinking, Deming’s principles, and understanding variation in reshaping software development practices.An anecdote by Henrik illustrates how estimation in software development can be misled by architectural complexities.Henrik recommends understanding queueing theory and Little’s Law to enhance workflow management and delivery predictability.Join Henrik Mårtensson at the Global Agile Summit 2025 to explore real-world Agile success stories and practical strategies.Henrik Mårtensson, a management consultant, blends Theory of Constraints, Lean, Agile, and Six Sigma to tackle complex challenges in organizations.Connect with Henrik Mårtensson on LinkedIn for insights on strategy, organizational development, and process improvement.