Applying Function-Based Failure Propagation in Conceptual Design

Krus, Daniel; Lough, Katie Grantham

doi:10.1115/detc2007-35475

Cited by 15 publications

(9 citation statements)

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“…• Identify and mitigate potential failure modes as well as trace the functional propagation of these failure modes [58][59][60]. • Perform requirements flow down.…”

Section: Wrap-upmentioning

confidence: 99%

Function Design Framework (FDF): Integrated Process and Function Modeling for Complex Systems

Nagel

Stone

Hutcheson

et al. 2008

Volume 4: 20th International Conference on Design Theory and Methodology; Second International Conference on Micro- And Nanosys

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Functional models are representations of the energy, material and signal transformations that occur through the expected or normal operating condition of a product. As the complexity of products increases, there are often multiple dimensions to their operation in addition to their nominal operating state, e.g., crash protection systems in a car or laser leveling and stud finding combined in a single tool. Here system state is used to represent the different operational dimensions of a product, and a representation scheme that allows designers to fully explore system functionality of products with multiple system states is explored. Previous work in process and functional analysis is integrated to better represent complex systems with multi-dimensional system functionality. Process and functional modeling are integrated to produce a new function design framework supporting user-defined fidelity of hierarchical models for functional representation. An example modeling a complete automobile life cycle illustrates the development of integrated process and functional models within a complex system analysis.

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“…• Identify and mitigate potential failure modes as well as trace the functional propagation of these failure modes [58][59][60]. • Perform requirements flow down.…”

Section: Wrap-upmentioning

confidence: 99%

Function Design Framework (FDF): Integrated Process and Function Modeling for Complex Systems

Nagel

Stone

Hutcheson

et al. 2008

Volume 4: 20th International Conference on Design Theory and Methodology; Second International Conference on Micro- And Nanosys

View full text Add to dashboard Cite

show abstract

“…Hutcheson et al presented a methodology to enable the design of health monitoring modules concurrently with system conceptual design in order to reveal, model, and eliminate associated risks and failures [4]. Additionally, Grantham et al presented the Risk in Early Design (RED) method of formulating functional-failure likelihood and consequence based risk assessment classified high-risk to low-risk functionfailure combinations [5,7].…”

Section: Function-based Reliability Methods In Conceptual Designmentioning

confidence: 99%

“…To overcome this limitation, other work has focused on including the propagation of failure in the analysis. As a direct extension, the failure propagation method introduced by Krus and Grantham-Lough [5] builds upon the FFDM and RED [7] methods to develop failure propagation mapping based on historical data using a functional model for system representation. This method adapted the element of "common interfaces" from change prediction [22] to apply to the functional level.…”

Section: Conceptual Failure Propagation Analysismentioning

confidence: 99%

“…The state of "No Flow" was captured in [5] as a function failure but is included here for completeness. By categorizing the flow states of all flows that appear in a system, and using a critical event simulation, it is possible to identify the failures that propagate along both designed and potential EMS flow paths.…”

Section: Approachmentioning

confidence: 99%

“…Most reliability analysis techniques, however, require mature designs to provide meaningful information. To fully realize the aforementioned benefits, recent research efforts have focused on developing and applying reliability methods at the earliest, conceptual stages of design by using function-based system models as a basis for failure analysis [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flow State Logic (FSL) for Analysis of Failure Propagation in Early Design

Jensen

Tumer

Kurtoglu

2009

Volume 8: 14th Design for Manufacturing and the Life Cycle Conference; 6th Symposium on International Design and Design Educati

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For safety critical complex systems, reliability and risk analysis are important design steps. Implementing these analyses early in the design stage can reduce costs associated with redesign and provide important information on design viability. In the past several years, various research methods have been presented in the design community to move reliability analysis into the early conceptual design stages. These methods all use a functional representation as the basis for reliability analysis. This paper asserts that, in non-nominal system states, the functional representation limits the scope of failure analysis. Specifically, when failures are modeled to propagate along energy, material, and signal (EMS) flows, a nominal-state functional model is insufficient for modeling all types of failures. To capture possible failure propagation paths, a function-based reliability method must consider all potential flows, and not be limited to the function structure of the nominal state. In this light, this paper introduces the Flow State Logic (FSL) method as a means for reasoning on the state of EMS flows that allows the assessment of failure propagation over potential flows that were not considered in a functional representation of a “nominally functioning” design. A liquid fueled rocket engine serves as a case study to illustrate the benefits of the methodology.

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7.1.3 Fault Propagation and Sensitivity Analysis to Support Counterterrorism Activities

Nagel

Greer

Stone

et al. 2009

INCOSE International Symp

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Abstract. This paper discusses research on fault propagation analysis and two associated fault sensitivity measurement approaches for the investigation of faults in human-centric processes. The techniques presented grew out of a joint project between the U.S. Air Force Academy and Missouri University of Science and Technology to investigate terrorist activities involving improvised explosive devices. Two potential counterterrorism activities related to improvised explosive devices are developed through the paper to demonstrate the application and usefulness of the methodologies. Provided with the examples is a discussion of fault propagation, the sensitivity analysis performed, an interpretation of the results, and an overview of anticipated future applications in system design.

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Applying Function-Based Failure Propagation in Conceptual Design

Cited by 15 publications

References 0 publications

Function Design Framework (FDF): Integrated Process and Function Modeling for Complex Systems

Function Design Framework (FDF): Integrated Process and Function Modeling for Complex Systems

Flow State Logic (FSL) for Analysis of Failure Propagation in Early Design

7.1.3 Fault Propagation and Sensitivity Analysis to Support Counterterrorism Activities

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