Modern systems development becomes more and more complicated due to the need on the ever-increasing capability of the systems. In addition to the complexity issue, safety concern is also increasing since the malfunctions of the systems under development may result in the accidents in both the test and evaluation phase and the operation phase. Those accidents can cause disastrous damages if explosiveness gets involved therein such as in weapon systems development. The subject of this paper is on how to incorporate safety requirements in the design of safety-critical systems. As an approach, a useful system structure using the method of design structure matrix (DSM) is studied while reflecting the need on systems safety. Specifically, the effects of system components failure are analyzed and numerically modeled first. Also, the system components are identified and their interfaces are represented using a component DSM. Combining the results of the failure analysis and the component DSM leads to a modified DSM. By rearranging the resultant DSM, a modular structure is derived with safety requirements incorporated. As a case study, application of the approach is also discussed in the development of a military UAV plane.

Abstract
 1. 서 론
 2. 문제의 정의
  2.1 항공기 시스템 개발 환경에서 안전성 반영의 개요
  2.2 DSM 기법을 활용한 시스템 설계와 안전성 요소의 연계
  2.3 연구의 필요성
  2.4 연구의 목표 및 범위
 3. 구성품 고장 심각도를 활용한 안전성평가
  3.1 고장 심각도 관점에서 위험도 분류 매트릭스의 분석
  3.2 구성품 수준에서 안전성 평가
 4. 안전성 평가가 반영된 DSM 기반설계 수행
  4.1 DSM을 통한 인터페이스 식별
  4.2 식별된 인터페이스 구성품의 중요도 평가
  4.3 위험성 중요도가 반영된 DSM의 재배열및 모듈 도출
 5. 무인항공기 시스템에 대한 사례 연구
 6. 결 론
 7. References
 저 자 소 개

• 김영민(아주대학교 시스템공학과) | Young Min Kim
• 이재천(아주대학교 시스템공학과) | Jae-Chon Lee Corresponding author