exida explains Blog

At exida we have studied hundreds of sets of field failure data from various sources.  Some of these data sets have indicated differences in failure rates by two orders of magnitude for the same product type!  After tracing through the data collection process for many of these field failure data sets,…

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Two common gaps exida encounters when evaluating vendor compliance against the IEC 62443-4-1, IEC 62443-4-2 and IEC 62443-3-3 standards are:

1. Inadequate or unclear Security Guidelines.    
2. A lack of documentation on the security audit records (AKA logs).   

Improving compliance in these areas is also a very cost-effective…

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Want to improve your safety lifecycle and be more compliant with IEC 61508?  Focus on the things that have the most benefit.  Like what?  What are some of these valuable things?  

One of the major deficiencies I see while doing certification assessments is…

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No, you probably don’t want to hurt me.  But if your product is used in a safety application, and my job depends on your product doing its job, will it hurt me if it fails?

With so many of us doing more things differently during the COVID pandemic, I wonder if…

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The term SIL is rapidly spreading to Request for Proposals (RFP) and purchase requirements in many industries.  But in many of those industries, few have heard about SIL and fewer have a grasp of the fundamental concepts of SIL.  SIL is a term that means Safety Integrity Level. It is used…

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exida, the global leader in functional safety, industrial automation cybersecurity, and alarm management is thrilled to announce a new online testing platform for their CFSE (Certified Functional Safety Expert) and CACE (IEC 62443 Certified Automation Cybersecurity Expert) Certification programs.  This also includes the CFSP and CACS…

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It is tough to receive an email with this message from a prospective CFSE candidate.  I know that when I have failed exams, I want to understand what was wrong so I can study those areas of knowledge more deeply and try again. Given the recognition and prestige…

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After careful planning and development of your system, the last thing you want to worry about is the credibility of your certification. Although it may seem like a given for your certification to be well accepted by your customers, it is never a bad idea to dig a little…

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Failure data collection can seem tedious, time consuming and expensive.  Just figuring out what data to collect can be challenging.  Failure data analysis can be overwhelming with a sense of “I don’t even know where to begin.”  So it is not surprising that these useful, vital activities are often neglected especially when…

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If you find yourself faced with this question you might be wondering why it is that having successfully used risk assessments without FMEDA your team are suddenly faced with the complexity of executing FMEDAs.

Maybe us safety people answer with a follow…

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A few weeks ago, we were asked to help a fellow colleague who received a message regarding their FS Engineer (TÜV Rheinland) certificate :

We are aware, that the validity of your FS Expert (TÜV Rheinland) certificate is expiring this month. Kindly be informed that we have had a…

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IEC 61508 Certification is a Third-Party Validation against the standard’s requirements, comprising of:

• Detailed Analysis of engineering processes to determine Systematic Capability and Cybersecurity Strength 
• Detailed Analysis of hardware design / design margins resulting in Random Failure Rate in all failure modes
• Analysis/Testing to show safe, correct operation and Cybersecurity Susceptibility

To achieve an…

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If you’ve got lots of proven field history for a product, you should be able to claim that good work and get your product certified for use in functional safety applications.  It is certainly still a challenge, but it is easier than certifying a new product.  The…

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An owner-operator engineer compared the failure rates for two similar products from an exida certificate with those from a TÜV Italia certificate.  exida numbers were an order of magnitude higher.  Who is right?  

There are some relevant fundamental facts in the field of Reliability Engineering:

1. Failure rate prediction methods depend…

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SILSafeData contains upper and lower bound ranges of dangerous undetected failure rates for many automation devices. It was created by exida using statistical analysis of FMEDA failure rate predictions. The component database used in the FMEDAx tool is based on…

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