Of course, Royce was working at a time when code and compute cycles were many orders of magnitude more costly than today, so he was unable to extend the full benefits of iteration as far as continuous delivery to users
Unable to easily cut production code, Royce advocated 'simulation' to reduce risk: "... the pilot effort could be compressed to three months perhaps... [the personnel involved] must have an intuitive feel for analysis, coding, and program design. They must quickly sense the trouble spots in the design, model them, model their alternatives... and finally arrive at an error-free program."
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