Winston W. Royce

In the 1991 article Software Architecture: Integrating Process and Technology Royce and Royce describe the connection between architecture and the software development process. According to Philippe Kruchten et al. (2006) this article was the first "to position software architecture — in both title and perspective — between technology and process."

The Waterfall model for software development is mistakenly attributed to Royce. Barry Boehm wrote in 1987:

In the early 1980s Winston Royce coined the term "software system engineering" (SwSE) at one of the seminars of the Management of Software Acquisition course at the Defense Systems Management College at Fort Belvoir, Va.

To picture this iterative development Royce proposed a number of approaches, although he never used the term waterfall nor advocated it as an effective methodology. The earliest use of the term "waterfall" may have been a 1976 paper by Bell and Thayer.

Royce started his 1970 article 'Managing the development of large software systems' with a statement about the origin of his ideas:

Royce had begun his career as assistant professor at the California Institute of Technology. In 1961 he started as project manager in the aerospace division of TRW. His first project concerned the design of a mission planning and orbit selection system for spacecraft. In the following years he was involved in the research and development of several large and complex software systems, and started developing new methodologies for improving the management of software project. In 1970 he published his influential article "Managing the development of large software systems", in which he presented several project management models, including what we now know as waterfall, iterative, and agile. In 1985, he received the AIAA Information Systems Award. During the 1980s he was director at Lockheed Software Technology Center in Austin, Texas. He retired in 1994 and died the following year at his home in Clifton, Virginia.

Winston Walker Royce (August 15, 1929 – June 7, 1995) was an American computer scientist, director at Lockheed Software Technology Center in Austin, Texas. He was a pioneer in the field of software development, known for his 1970 paper from which the Waterfall model for software development was mistakenly drawn.

Born in 1929, Royce entered the California Institute of Technology, where he received his BS in physics, his MS in aeronautical engineering and in 1959 his PhD in aeronautical engineering under Julian David Cole with the thesis Transonic flow over a non-lifting, slender body of revolution.