exida explains Blog

Entries tagged with: SIS

How Good Is Your Functional Safety Management?

How Good Is Your Functional Safety Management?

How Secure Are Your SIS, BPCS, and/or SCADA Systems?

How Secure Are Your SIS, BPCS, and/or SCADA Systems?

As an end-user, do you know how reliable and safe your Safety Instrumented Systems (SIS) and Basic Process Control Systems (BPCS) are from potential cyber issues?  Do you rely on your vendor statements regarding the robustness of their products?  If the answer to these questions is “don’t know”…

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How Secure Is Your Safety Instrumented System (SIS)?

How Secure Is Your Safety Instrumented System (SIS)?

As the cybersecurity threats in the industrial world continue to rise, the automation world continues to grapple with how to address these issues.  As such, the newly released IEC61511-1: 2016 edition has included a new clause to address this (Clause 8.2.4).  In essence, End Users have to carry out…

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Making Use of Leading and Lagging Indicators – Are You Using These for Functional Safety?

Making Use of Leading and Lagging Indicators – Are You Using These for Functional Safety?

Some of you reading this may not be aware or familiar with the terms “leading” and “lagging” indicators, when applied to Functional Safety.  The concept isn’t new but does provide significant benefit when applying this to Functional Safety because, if used correctly, these indicators can help significantly improve performance. …

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Safety Requirements Specifications (SRS):  The Good and the Bad

Safety Requirements Specifications (SRS):  The Good and the Bad

The IEC 61511 Standard requires the user to create a Safety Requirements Specification (SRS) for a Safety Instrumented System (SIS) that incorporates all the analysis done during the Risk Assessment, HAZOP/PHA and LOPA reviews.  The SRS falls into two types: an initial conceptual SRS, often referred to as the…

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SILSafe Data Website

SILSafe Data Website

exida has launched the web site www.silsafedata.com. SILSafe Data is a web site listing a number of product categories used in process control and the expected range of failure rates for process industry applications. The use of realistic and application appropriate failure rate data has a significant…

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Ten Years Later
  • by Steve Gandy, CFSP
  • Wednesday, February 19, 2014
  • Certification

Ten Years Later

It’s hard to believe that the IEC61511 standard has been in existence since 2003, and most companies operating in the process, chemical, and refining industries (or any other hazardous process manufacturer) have adopted its practices.  It’s also significant that any plants that were built back then with a…

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What Good is a Safety Manual?

What Good is a Safety Manual?

Many products have options and features that are valuable to users.  But not all these features should be permitted while the product is performing a safety function.  For example, HART communications should not be permitted to write data to a transmitter while it’s performing the safety function.  If you…

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Why Run-to-Fail Is Not A Good Maintenance Strategy For SIS

Why Run-to-Fail Is Not A Good Maintenance Strategy For SIS