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IBM Journal of Research and Development  
Volume 28, Number 1, Page 52 (1984)
Software Quality
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A New Programming Methodology for Long-Lived Software Systems

by R. Strom, N. Halim
A new software development methodology based on the language NIL is presented. The methodology emphasizes (1) the separation of program development into functional specification and tuning phases, (2) the use of a fully compilable and executable design, (3) an interface definition and verification mechanism. This approach reduces life-cycle costs and improves software quality because (a) errors are detected earlier, and (b) a single functional design can be re-used to produce many implementations.
Related Subjects: Programming, programs, and programming languages; Software reliability