Sally Shlaer

Sally Shlaer (December 3, 1938 – November 12, 1998) was an American mathematician, software engineer and software methodologist, known as co-developer of the 1980s Shlaer–Mellor method for software development.

Biography Born in Cleveland, Ohio, Shlaer received a BS in Mathematics in 1960 from Stanford University and started a graduate study at the Australian National University.

At Stanford Shlaer had started programming in Fortran and assembler. In 1965 she started as a software engineer at Los Alamos National Laboratory. In 1977 she became project manager in software development at Lawrence Berkeley Laboratory, where she guided the development of a new Integrated Control System for the Bay Area Rapid Transit system.

At Lawrence Berkeley Laboratory, she led a team of software developers to build a new control system for the subway of the Bay Area Rapid Transit system. The existing control system software was considered impossible to continue using, making replacement necessary. Working with Steve Mellor, they replaced the original Fortran and assembly language code with new code, going from seventy thousand lines to two thousand. This analysis has since been called "legendary".

Publications 1988. Object Oriented Systems Analysis: Modeling the World in Data. With Stephen J. Mellor. Prentice Hall, 1988. 1991. Object Life Cycles: Modeling the World In States. With Stephen J. Mellor. Prentice Hall, 1991.

Articles, a selection: 1992. "A Comparison of OOA and OMT" Project Technology, Inc. White paper 1996. "The Shlaer-Mellor Method". Project Technology, Inc. White paper 1997. "Recursive Design of an Application-Independent Architecture" With Stephen J. Mellor in IEEE Software, January 1997.