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A network perspective on assessing system architectures: Robustness to cascading failure
Systems Engineering ( IF 2 ) Pub Date : 2020-07-22 , DOI: 10.1002/sys.21551
Matthew W. Potts 1 , Pia A. Sartor 1 , Angus Johnson 2 , Seth Bullock 3
Affiliation  

Despite a wealth of system architecture frameworks and methodologies available, approaches to evaluate the robustness and resiliency of architectures for complex systems or systems of systems are few in number. As a result, system architects may turn to graph‐theoretic methods to assess architecture robustness and vulnerability to cascading failure. Here, we explore the application of such methods to the analysis of two real‐world system architectures (a military communications system and a search and rescue system). Both architectures are found to be relatively robust to random vertex removal but more vulnerable to targeted vertex removal. Hardening strategies for limiting the extent of cascading failure are demonstrated to have varying degrees of effectiveness. However, in taking a network perspective on architecture robustness and susceptibility to cascade failure, we find several significant challenges that impede the straightforward use of graph‐theoretic methods. Most fundamentally, the conceptualization of failure dynamics across heterogeneous architectural entities requires considerable further investigation.

中文翻译:

从网络角度评估系统体系结构:级联故障的鲁棒性

尽管有大量可用的系统架构框架和方法,但是评估复杂系统或系统系统的架构的健壮性和弹性的方法很少。结果,系统架构师可能会转向图论方法来评估架构的健壮性和级联故障的脆弱性。在这里,我们探索了这种方法在分析两个实际系统体系结构(军事通信系统和搜救系统)中的应用。发现这两种体系结构对随机顶点删除都相对健壮,但对目标顶点删除更脆弱。用于限制级联故障程度的强化策略已证明具有不同程度的有效性。然而,从网络的角度来看架构稳定性和对级联故障的敏感性,我们发现了几个重大挑战,这些挑战阻碍了图论方法的直接使用。从根本上说,跨异构体系结构实体的故障动态的概念化需要大量的进一步研究。
更新日期:2020-07-22
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