Dependency Analysis of System-of-Systems Operational and Development Networks

Guariniello, Cesare; DeLaurentis, Daniel A.

doi:10.1016/j.procs.2013.01.028

Cited by 42 publications

(19 citation statements)

References 4 publications

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“…In the definition of FDNA Pinto 2009, 2012;Guariniello and DeLaurentis 2013a), the slope of the function relating the operability of nodes i and j in the COD zone was always equal to 1. This meant that, starting from the minimum operability of node j (for low levels of operability of node i), in the COD zone this operability O j would depend solely on the operability of node i, without any contributions by the SE of node j.…”

Section: Impact Of Dependencymentioning

confidence: 99%

Supporting design via the System Operational Dependency Analysis methodology

Guariniello

DeLaurentis

2016

Res Eng Design

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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.

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Section: Impact Of Dependencymentioning

confidence: 99%

Supporting design via the System Operational Dependency Analysis methodology

Guariniello

DeLaurentis

2016

Res Eng Design

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“…The method was originally formulated by Garvey and Pinto (19,20), who applied it to capability portfolio analysis and risk assessment. FDNA has been modified to be suitable to analyze interdependencies in SoS, and successfully applied to aerospace SoS (21).…”

Section: Functional Dependency Network Analysis (Fdna)mentioning

confidence: 99%

“…Also, a stochastic version of FDNA, involving a probability distribution for the operability of the systems, has been developed and tested, and the results are described in ref. 21. FDNA identifies the most critical nodes in the network, as well as the most important dependencies.…”

Section: Functional Dependency Network Analysis (Fdna)mentioning

confidence: 99%

Maintenance and Recycling in Space: Functional Dependency Analysis of On-Orbit Servicing Satellites Team for Modular Spacecraft

Guariniello

DeLaurentis

2013

AIAA SPACE 2013 Conference and Exposition

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This paper introduces an innovative perspective in the problem of on-orbit servicing and maintenance. A network of modular satellites and servicing satellites is modeled as a two-level System-of-Systems. At the lower level, the architecture of the modular satellites is analyzed in terms of functional interdepencies between the component modules. Analysis of the impact of such interdependencies gives insight into the operability of the satellite, and accounts for partial failures, redundancies, and criticality of the modules. At the higher level, communication, observation, and experimental satellites and constellation are constituents of a System-of-Systems functional network. The other components of this network are servicing satellites, able to perform inspection, refueling, maintenance. At this level, results from the overall functional dependency analysis are used to evaluate and compare different architectures, i.e. different number, capabilities, and location of servicing satellites. We discuss the innovation brought by the proposed approach with respect to the current practice. A hypothetical scenario is considered, featuring satellites with different architectures, whose parts are susceptible to aging and to failures over time, and on-orbit servicing satellites. Results show not only the general applicability of the method in order to perform analysis, but also possible future applications of both the proposed concepts and the analytical tool in space systems architecture and design. Nomenclature COD ij= criticality of dependency between node i and node j COD_O j = part of the operability of node j depending on the criticality of all its dependencies COD_O ji = part of the operability of node j depending on the criticality of the dependencies from node j O i = operability of node i SE i = self-effectiveness of node i SOD ij = strength of dependency between node i and node j SOD_O j = part of the operability of node j depending on the strength of all its dependencies SOD_O ji = part of the operability of node j depending on the strength of the dependencies from node j

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“…There is a rich body of literature about SoS, concerned with definitions, developing specific approaches, and addressing key issues such as dependency analysis of SoS, distributed resource management in SoS, decentralized optimization in SoS, and incentive‐based negotiation models . FoS are a subclass of SoS, and as per the current definitions of SoS, fall under the category of virtual SoS.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, architects designing a system to be federated are trading design options that depend both on network externality effects 8 and specifications of systems outside their control. This means that There is a rich body of literature about SoS, concerned with definitions, 9 developing specific approaches, 10,11 and addressing key issues such as dependency analysis of SoS, 12 distributed resource management in SoS, 13 decentralized optimization in SoS, 14 and incentivebased negotiation models. 15 FoS are a subclass of SoS, and as per the Several authors have discussed the nature of an SoS, in an attempt of distinguishing them from conventional systems.…”

Section: Introductionmentioning

confidence: 99%

Architecting federations of systems: A framework for capturing synergy

Lluch

Golkar

2019

Systems Engineering

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This paper defines Federations of Systems, introduces a tailored architecting framework, and demonstrates it in a satellite design case study. While certainly not being new concepts in the literature, federations are a class of Systems of Systems (SoS) that have not been extensively explored due to the scarcity of applied examples and still few practitioners facing their specific design challenges. This is expected to change with the advent of the Internet of Things, Machine to Machine applications, collaborative consumption, and Federated Satellite Systems. It has become henceforth necessary to develop approaches in design and architecting capable of addressing such interconnected sets of systems. Federations are SoS characterized by the absence of global goals and stakeholders, and cooperation enabled only on an opportunistic basis. Systems engage in federations when the perceived benefit exceeds the costs of the necessary interfaces. The proposed framework quantifies the upper limits to the net benefits of cooperation between systems through the concept of synergy. Using synergy as a heuristic to navigate federated design spaces, the framework predicts the appearance and evolution of federations. The demonstration of the framework in a six‐satellite federation shows that advantages of federating emerge with the collaboration between just two systems. Interface costs, architectural cost preferences, and network topology drive the achievable benefits. Specifically, when considering communication architectures under 80 MUSD for satellite systems, federating is advantageous when the interface lifecycle costs are below 15 MUSD. This demonstration case exemplifies how federating can assist systems in achieving design points that dominate the solutions of their local tradespace.

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Dependency Analysis of System-of-Systems Operational and Development Networks

Cited by 42 publications

References 4 publications

Supporting design via the System Operational Dependency Analysis methodology

Supporting design via the System Operational Dependency Analysis methodology

Maintenance and Recycling in Space: Functional Dependency Analysis of On-Orbit Servicing Satellites Team for Modular Spacecraft

Architecting federations of systems: A framework for capturing synergy

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