A Safety Analysis Method for Control Software in Coordination with FMEA and FTA

Takahashi, Masakazu; Anang, Yunarso; Watanabe, Yoshimichi

doi:10.3390/info12020079

Cited by 6 publications

(4 citation statements)

References 21 publications

(23 reference statements)

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“…They together create an indirect risk of a failure, for example, if the operator is injured, the autoclave will be out of service with great probability. These sources of risk, in view of their indirect action, are not considered in the construction of FTA [14,15]. Many authors, for example Girmanová et al, propose to construct a cause-and-effect diagram, also called Ishikawa's diagram by its creator, before constructing a fault tree.…”

Section: Fault Tree Analysis (Fta) Analysismentioning

confidence: 99%

Application of FTA Analysis for Calculation of the Probability of the Failure of the Pressure Leaching Process

et al. 2021

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European Union legislation requires organizations to assess their processes in the context of risk management. The main task of risk management is to manage all risks that can significantly affect the outcome of processes. The article is focused on risk evaluation in pressure leaching at elevated temperature using the method Fault Tree Analysis (FTA). The effectivity of pyrite and arsenic pyrite decomposition by oxidative pressure leaching is influenced by the duration of the process, by the temperature, concentration of the leaching solution and by a density of the slurry. It was found that, under equitable conditions, the arsenic pyrite decomposes more intensely than pyrite. Under laboratory conditions, leaching is performed in an autoclave. Due to the aggressive environment, increased pressure and temperature, process failure is possible. Its probability was calculated by FTA. It has been found that the probability of the top event in the examined process was disproportionately high (0.057) and represents an invitation to take corrective actions. The Monte Carlo method was used for the simulation of the effect the probability of basic events on the probability of the top event—the failure of the leaching process.

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Section: Fault Tree Analysis (Fta) Analysismentioning

confidence: 99%

Application of FTA Analysis for Calculation of the Probability of the Failure of the Pressure Leaching Process

et al. 2021

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“…As a typical bottom-up technique for potential risk modeling and management [38], since it was introduced by NASA in 1960s [39], failure mode and effects analysis (FMEA) has been extensively used in practical applications, such as medical treatment [40,41], aircraft landing systems [42,43], the automotive industry [44,45], software engineering [46,47], and so on [48,49]. Traditional FMEA processes can be divided into five steps, including (1) assembling a team, (2) determining the scope of FMEA, (3) identifying potential failure modes and effects, (4) calculating the risk priority number (RPN) of each failure mode and ranking, and (5) reporting the analysis results [50].…”

Section: Introductionmentioning

confidence: 99%

Uncertainty Management in Assessment of FMEA Expert Based on Negation Information and Belief Entropy

Tang

Zhang

et al. 2023

Entropy

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The failure mode and effects analysis (FMEA) is a commonly adopted approach in engineering failure analysis, wherein the risk priority number (RPN) is utilized to rank failure modes. However, assessments made by FMEA experts are full of uncertainty. To deal with this issue, we propose a new uncertainty management approach for the assessments given by experts based on negation information and belief entropy in the Dempster–Shafer evidence theory framework. First, the assessments of FMEA experts are modeled as basic probability assignments (BPA) in evidence theory. Next, the negation of BPA is calculated to extract more valuable information from a new perspective of uncertain information. Then, by utilizing the belief entropy, the degree of uncertainty of the negation information is measured to represent the uncertainty of different risk factors in the RPN. Finally, the new RPN value of each failure mode is calculated for the ranking of each FMEA item in risk analysis. The rationality and effectiveness of the proposed method is verified through its application in a risk analysis conducted for an aircraft turbine rotor blade.

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“…Another challenge is related to the existence of a variety of safety assessment approaches and their modifications (including techniques for safety constituents, such as functional safety, cybersecurity, etc.). There are many assessment techniques (FMECAfailure modes, effects, and criticality analysis, FTA-fault tree analysis, HAZOP-hazard and operability study, HAZID-hazard identification study [5][6][7]) that can be applied separately and jointly to guarantee the trustworthiness of results. Besides, there is a problem of incompatibility and inconsistency of their outputs in the general case [8], etc.…”

Section: Introduction 1motivationmentioning

confidence: 99%

Towards Trustworthy Safety Assessment by Providing Expert and Tool-Based XMECA Techniques

et al. 2022

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Safety assessment of modern critical instrumentation and control systems is a complicated process considerably dependent on expert techniques, single/multiple faults consideration scope, other assumptions, invoked limitations, and support tools used during the assessment process. Ignoring these assumptions, as well as the significance of expert and tool influence, could lead to such effects as functional safety underestimation or overestimation in such a manner that functional safety assessment correctness and accuracy are affected. This paper introduces XMECA (x modes, effects, and criticality analysis, where x could be from different known techniques and domains—failures in functional safety, vulnerabilities and intrusions regarding cybersecurity, etc.) as a key technique of safety assessment. To verify the results obtained as XMECA deliverables, expert and uncertainty modes, effects, and criticality analysis (EUMECA) is performed, in particular focusing on decisions and judgments made by experts. Scenarios for processing verbal and quantitative information of XMECA tables from experts are offered. A case study of a possible functional safety assessment approach that considers the above-mentioned techniques and a supporting tool is provided. To assess the trustworthiness of safety analysis and estimation using XMECA, a set of the metrics is suggested. Features of adapting the suggested method for security assessment considering intrusions, vulnerabilities, and effects analysis (IMECA technique) are discussed.

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A Safety Analysis Method for Control Software in Coordination with FMEA and FTA

Cited by 6 publications

References 21 publications

Application of FTA Analysis for Calculation of the Probability of the Failure of the Pressure Leaching Process

Application of FTA Analysis for Calculation of the Probability of the Failure of the Pressure Leaching Process

Uncertainty Management in Assessment of FMEA Expert Based on Negation Information and Belief Entropy

Towards Trustworthy Safety Assessment by Providing Expert and Tool-Based XMECA Techniques

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