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Software FMEA (failure mode and effects analysis) method based on level dependency modeling

A hierarchical and software technology, applied in the modeling field based on hierarchical dependency model, can solve problems such as difficult to express paths, unclear layers, and poor objectivity of analysis methods, so as to reduce randomness and improve accuracy.

Inactive Publication Date: 2013-12-25
BEIHANG UNIV
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Problems solved by technology

[0006] In order to solve the problems faced by the embedded software FMEA, such as unclear levels, difficult to express paths, poor objectivity of analysis methods, and weak computer aids, the present invention aims at structurally developed safety-critical software and combines the characteristics of FMEA itself to construct a hierarchical dependency model , so that the FMEA failure impact analysis and cause analysis can be transformed into the node accessibility problem of the hierarchical dependence model, which provides a theoretical method for the objective analysis and automatic analysis of the software FMEA

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  • Software FMEA (failure mode and effects analysis) method based on level dependency modeling
  • Software FMEA (failure mode and effects analysis) method based on level dependency modeling
  • Software FMEA (failure mode and effects analysis) method based on level dependency modeling

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Embodiment Construction

[0025] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be further described in detail and in-depth through specific embodiments below.

[0026] The software FMEA method based on hierarchical dependence modeling of the present invention, concrete realization steps are as follows:

[0027] The first step is to start from the demand, have a comprehensive and in-depth understanding of the analyzed object, determine the analysis goal,

[0028] System-level software FMEA is mainly carried out in the requirements analysis and outline design stages of software development. Like traditional system-level software FMEA, the first step is to confirm the target to be analyzed and perform a functional description. The software forms a software requirement description document in the requirements analysis stage, and the software function flow chart is given in the document. The function flow chart gives...

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Abstract

The invention discloses a software FMEA (failure mode and effects analysis) method based on level dependency modeling. The method includes 1, understanding an object to be analyzed completely and deeply as required, and determining an analyzing target; 2, establishing a system-grade level dependency model by utilizing outline design as a reference; 3, selecting a module to be analyzed and determine a failure mode thereof, analyzing a failure influence propagation path and a failure reason tracing path to determine a failure reason and the failure influence and provide improvements according to system-grade level dependency model reachability node analysis; 4, selecting a detailed-grade FMEA analyzing object according to a system-grade FMEA result; 5 establishing a detailed-grade level dependency model on the basis of detailed design or a pseudo-code of the selected object to be analyzed; 6, selecting key variables to be analyzed according to the detailed-grade level dependency model; 7, determining a specific failure mode of the key variables to be analyzed, and analyzing producing reasons and failure influences of the variables and providing improvements according to detailed-grade level dependency model reachability node analysis.

Description

technical field [0001] The present invention relates to the field of software failure mode and effect analysis (FMEA) in software reliability engineering, and specifically refers to a method for effectively, conveniently and automatically performing software FMEA based on hierarchical dependency model modeling. Background technique [0002] Software FMEA is one of the effective ways to realize software reliability growth and evaluate software reliability. Software FMEA is divided into system-level software FMEA and detailed-level software FMEA. The system-level mainly adopts the method of hierarchical diagram, and the detailed-level adopts the method of variable clues. [0003] The traditional hierarchical diagram-based method determines the analysis level and analysis objects of the system according to the function and structure level of the software system, such as functional modules, software components or units, etc. Traditional system-level software FMEA often relies p...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 吴玉美吴立金刘斌
Owner BEIHANG UNIV
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