exida explains Blog

Entries tagged with: Loren Stewart

Welcome to the 2H Initiative

exida has been gathering field failure data for over a decade.  At this point we have a total of over 60 billion unit operating hours of field data for process industry devices.  This data has been used to create a 2H database for components.  exida is using this component…

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What is SIL compliance?

What is SIL compliance?

The Safety Integrety Level (SIL) of a product is determined by three things:

  1. The Systematic Capability Rating
  2. The  Architectural Constraints for the element
  3. The PFDavg Calculation for the product

The Systematic Capability Rating

Systematic Capability is established by having your quality management system audited per IEC 61508.…

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What is Stiction?

Many studies and organizations have defined stiction, or static friction, in different ways. A few examples of the various definitions are as follows:

  • According to Entech [1], ‚Äústiction is a tendency to stick-slip due to high static friction. The phenomenon causes a limited resolution of the resulting…

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What is Systematic vs. Random Capability?
  • by Loren Stewart, CFSE
  • Tuesday, September 01, 2015
  • Certification

What is Systematic vs. Random Capability?

There seems to be a bunch of confusion surrounding systematic capability and random capability.  I will try to clear up the confusion by explaining what is all considered and what the IEC standard says about both. 

Systematic Capability

  • Development process/quality system requirements depend on certification SIL level, higher…

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Where Do You Stand with Functional Safety?
  • by Loren Stewart, CFSE
  • Thursday, February 21, 2019

Where Do You Stand with Functional Safety?

This year, make your New Year’s resolution safety! 

Take a moment this year and think about where you currently stand with functional safety. And actually, be honest with yourself. REALLY honest. Do you proof test on time, or does it sometimes get pushed out? Do you pull your devices…

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