Supporting design via the System Operational Dependency Analysis methodology

Abstract

In this paper, we introduce the system operational dependency analysis methodology. Its purpose is to assess the effect of dependencies between components in a monolithic complex system, or between systems in a system-of-systems, and to support design decision making. We propose a parametric model of the behavior of the system. This approach results in a simple, intuitive model, whose parameters give a direct insight into the causes of observed, and possibly emergent, behavior. Using the proposed method, designers, and decision makers can quickly analyze and explore the behavior of complex systems and evaluate different architecture under various working conditions. Thus, the system operational dependency analysis method supports educated decision making both in the design and in the update process of systems architecture, without the need to execute extensive simulations. In particular, in the phase of concept generation and selection, the information given by the method can be used to identify promising architectures to be further tested and improved, while discarding architectures that do not show the required level of global features. Application of the proposed method to a small example is used to demonstrate both the validation of the parametric model, and the capabilities of the method for system analysis, design and architecture.

Autonomous driving systems hardware and software architecture exploration: optimizing latency and cost under safety constraints

“…The ASIL metric captures the robustness of a component of the physical architecture in this model. Further robustness analyses, such as the system operational dependency analysis (SODA) can be employed to extend safety considerations, but are not considered in this work.…”

PASoS: Processo para definição da arquitetura de Sistemas-de-Sistemas

“…Nos últimos anos, a pesquisa e o desenvolvimento de sistemas convergiu de sistemas isolados (monolíticos) para sistemas complexos compostos de múltiplos outros sistemas heterogêneos e independentes, os Sistemas-de-Sistemas (SoS). Embora ainda não exista uma definição clara de SoS, esses sistemas podem ser entendidos como uma classe de sistemas que é capaz de combinar sistemas constituintes, que são heterogêneos e independentes, e trabalham em consonância para atingir um objetivo [10,12,15] Com base nas características dos SoS apresentadas anteriormente, percebe-se que essa classe de sistemas está também inserida na classe de sistemas críticos de larga escala, pois eles são frequentemente aplicados em diversos contextos críticos tais como militar [4,7,12,14], saúde [2,19] e gestão de desastres [1,6,8,9,[15][16][17], possuem corportamentos emergentes que podem ou não ser desejados e são distribuídos em larga escala (Distribuição Geográfica).…”

System architecting and design space characterization

“…It requires a priori information on failure probability distribution on individual systems. Guariniello and DeLaurentis has developed a functional and developmental interdependency analysis for SoS based on Functional Dependency Network Analysis (FDNA) . It quantifies interdependencies based on a system operability measure that aggregates multiple measures of performance (MoPs) and design variables into a single measure.…”