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Software development has emerged as a critical bottleneck in the human use of automatic data processing. Beginning with ad hoc heuristic methods of design and implementation of software systems, problems of software maintenance and changes have become unexpectedly large. It is contended that improvement is possible only with more rigor in software design and development methodology. Rigorous software design should survive its implementation and be the basis for further evolution. Software development should be done incrementally, in stages with continuous user participation and replanning, and with design-to-cost programming within each stage.
Date of Publication: Dec. 1976