- by Hal Thomas, CFSE
- Friday, June 29, 2012
- Functional Safety
Relating Test Data to Operating Modes & “Proven in Use”
Everyone wants data, and generally everyone agrees high quality proven in use data is the best. Properly designed experimental testing is one means to simulate actual operation. That is what we all learned as far back as high school during our chemistry and physics labs. These tests can…
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- by Dr. William Goble, CFSE
- Wednesday, April 19, 2017
- Certification
Tales from the Certification Wars - Proven In Use versus Certification
There have been passionate debates in email and meetings about “Proven In Use” versus IEC 61508 certification. Most debates characterize these evaluation techniques as competing methods. In 2000 when IEC 61511 was being written there were few IEC 61508 certified products on the market. The…
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- by Dr. William Goble, CFSE
- Thursday, November 07, 2013
- Certification
Why Innovation in Safety?
In a marketplace where many of buyers of firmly committed to “proven in use,” many projects are still using 30 year-old logic solver designs. Proven in use is a valuable concept especially for field equipment where it is hard to evaluate how well a product design will…
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