The difficulties encountered during development of the Theater Battle Management Core System (TBMCS) provide lessons for systems engineering of large-scale, software-intensive systems.

Theater Battle Management Core System: Lessons for Systems Engineers
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The difficulties encountered during development of the Theater Battle Management Core System (TBMCS) provide lessons for systems engineering of large-scale, software-intensive systems. The absence of formal requirements and oversight, coupled with strong pressure for rapid deployment, caused the program to fail its first operational tests and actually delayed its deployment to the field.