Journal of the Korea Safety Management & Science (대한안전경영과학회지)

Korea Safety Management & Science (대한안전경영과학회)
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On the Development of Modularized Structures for Safety-Critical Systems by Analyzing Components Failure

시스템 구성품의 위험 심각도를 반영한 안전중시 시스템의 설계 모듈화에 관한 연구

  • 김영민 (아주대학교 시스템공학과) ;
  • 이재천 (아주대학교 시스템공학과)
  • Received : 2014.10.20
  • Accepted : 2014.12.18
  • Published : 2014.12.31
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Abstract

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.

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