A System-Theoretic Hazard Analysis Methodology for a Non-advocate Safety Assessment of the Ballistic Missile Defense System
MISSILE DEFENSE AGENCY WASHINGTON DC
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The Missile Defense Agency MDA is developing the Ballistic Missile Defense System BMDS as a layered defense to defeat all ranges of threats in all phases of flight boost, midcourse, and terminal. The BMDS integrates into a single system a number of Elements that had been developed independently, such as SBIRSDSP, Aegis BMD, and Ground-based Midcourse Defense GMD. The Elements of the BMDS have active safety programs, but complexity, coupling, and safety risk are introduced by their integration into a single system. Assessing the safety of the integrated BMDS required analysts to come up to speed using existing Element project documentation, assess the safety risk of the system, and make recommendations regarding hazard mitigation and risk acceptance. This effort often required conducting hazard analyses to supplement existing Element analysis work working with existing engineering artifacts and making recommendations for hazard mitigations late in the system life cycle, when there is less flexibility for design changes. This paper presents a safety assessment methodology based on STPA a systems-theoretic hazard analysis the assessment methodology provides an organized, methodical, and effective means to assess safety risk and develop appropriate hazard mitigations regardless of where in the life cycle the assessment is started.
- Antimissile Defense Systems
- Military Operations, Strategy and Tactics
- Guided Missiles