great historical moment

Requirement specifications can be derived effectively and quickly by developing a basic functioning system with the intended user, then further refining the system through user-suggested much more complete and accurate reflection of user requirements than any narrative description of a system that has not been built.

1981 memo from Martin E. Johnson to Kenneth J. Dickie, M. D. Subject: DM&S Medical Information Systems: Recent History and Recommended Course of Action.

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