SFMEA Software Failure Modes and Effects Analysis

2002 ◽  
pp. 615-616
Keyword(s):  
Failure Modes ◽  
Software Failure

A SFMEA Method Based on Modeling and Simulation by Rhapsody

2013 ◽  
Vol 470 ◽  
pp. 304-309
Author(s):  
Yu Mei Wu ◽  
Lei Sun ◽  
Li Jin Wu
Keyword(s):  
Modeling And Simulation ◽  
Failure Modes ◽  
Object Oriented ◽  
Safety Analysis ◽  
Software Failure ◽  
Common Technique ◽  
The Common

Software Failure Modes and Effects Analysis (SFMEA) technology is the most common technique in reliability and safety analysis. The common software FMEA methods are summarized and for object-oriented software, combined with the Rhapsodys characteristic of modeling and simulation, we proposed the SFMEA method based on modeling and simulation by Rhapsody and gave the process of implementation, the acquisition methods of failure modes and the SFMEA example.

scholarly journals Bond strength of modern self-adhesive resin cements to human dentin and different CAD/CAM ceramics

2020 ◽  
Vol 22 (2) ◽  
Author(s):  
Andrzej Małysa ◽  
Joanna Weżgowiec ◽  
Dariusz Danel ◽  
Klauss Boening ◽  
Katarzyna Walczak ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Failure Modes ◽  
Resin Cements ◽  
Adhesive Resin ◽  
Shear Strength Test ◽  
Software Failure ◽  
Human Dentin ◽  
Cad Cam ◽  
Bond Strengths

Purpose: The aim of the study was to evaluate the shear bond strength of CAD/CAM ceramics to dentin after cementation with conventional or self-adhesive resin cements. Methods: Three self-adhesive, self-etching cements (Panavia SA, RelyX U200, Maxcem Elite), and one conventional cement (Panavia V5), were selected to lute three CAD/CAM ceramics (IPS Empress CAD, IPS e.max CAD, IPS e.max ZirCAD) onto the dentin. The bond strength was evaluated using a shear strength test according to the PN-EN ISO 29022:2013-10. Evaluation of the differences was performed using the Statistica software. Failure modes were analyzed using a light microscope. Results: All the studied cements differed (regardless of the ceramic type) in the bond strength. The highest bond strength was observed in Panavia V5, lower – in RelyX U200 and Panavia SA, and the lowest – in Maxcem. For IPS e.max ZirCAD, it was observed that compared to Panavia V5, the other cements were characterized by a significantly higher bond strength. For the IPS Empress CAD and the IPS e.max CAD, Panavia V5 displayed the highest bond strength. For all the studied self-adhesive cements, the failure of adhesion between the cement and dentin was predominant mode. Conclusions: Significant differences were found in the shear bond strengths of the CAD/CAM ceramics luted to dentin using tested self-adhesive and conventional cements. The bond strength depended on the combination of ceramic and cement. The IPS e.max ZirCAD had the highest bond strength to dentin after cementation with RelyX U200, while the IPS Empress CAD and IPS e.max CAD – with Panavia V5.

Approach for the Evaluation of the Impact of Potential Software Failures in Software-Based Instrumentation and Control (I&C) Equipment in Nuclear Power Plants

2016 ◽  
Author(s):  
Hervé Mbonjo ◽  
Manuela Jopen ◽  
Birte Ulrich ◽  
Dagmar Sommer
Keyword(s):  
Failure Mode ◽  
Nuclear Power ◽  
Power Plants ◽  
Failure Modes ◽  
Operating Experience ◽  
Generic Model ◽  
Software Failures ◽  
Software Failure ◽  
Potential Safety ◽  
The Impact

In this paper we present an approach for the evaluation and assessment of the impact of software failures in software-based I&C systems of NPPs. The proposed two-step approach includes at the first step the identification of software failure modes on the basis of review of operating experience gained with software-based I&C systems and equipment. All probable software failures in software-based I&C systems should be identified and classified according to e. g. the concerned system, the observed software failure mode and to their actual and potential safety relevance. In a second step an evaluation of the potential impact of identified safety relevant software failure modes in a software-based I&C system shall be performed. The evaluation shall be done by means of a failure mode and effects analysis (FMEA) using a generic model of the software-based I&C system, i.e. software failure modes are postulated in the I&C system and their potential safety-relevant impact is analyzed.

scholarly journals Research on Software Failure Modes and Key Testing Methods of the Smart Meter

2019 ◽  
Vol 1168 ◽  
pp. 022026
Author(s):  
Fukuan Pang ◽  
Wenwu Cui ◽  
Chen Wang ◽  
Di Han ◽  
Yi Pan ◽  
...  
Keyword(s):  
Failure Modes ◽  
Smart Meter ◽  
Testing Methods ◽  
Software Failure
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