exida explains Blog

To Be an Alarm…Or Not to Be?

  • by John Yozallinas, CFSE
  • Thursday, March 15, 2012
  • Certification

We’re Only Human

We’re only human.  Most of the time, that is a good thing.  But humans seem to accept more risk over time when nothing bad has happened.  We lose our vigilance.  We take more chances.  A close call might only be remembered as an unusually rare anomaly instead of a…

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Do you have class?

  • by John Yozallinas, CFSE
  • Thursday, February 23, 2012
  • Certification

7 Ways to Keep your Auditor Happy

1. Name your files to make auditing easier; a filename with cryptic job numbers and abbreviations that are used within the company may not be easily understood or cataloged by an auditor

2. Give the auditor the ‘secret decoder ring’ for cryptic company acronyms and abbreviations

3. Have clear…

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Babies, Bathwater, and Australian Safety Laws

The old saying goes, “Don’t throw the baby out with the bathwater.” But it looks like a number of people in Australia may be in danger of doing just that with their response to the country’s newly harmonized health and safety laws.

Australia’s new Read More...

Outrage! Panic! Indifference?

How should you react to news of PLC security vulnerabilities? 

Project Basecamp was an exercise conducted at the S4 Security Conference that was held last month in Miami, Florida.  At the event, six security researchers reported their findings on the…

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  • by Iwan van Beurden, CFSE
  • Tuesday, January 17, 2012
  • Certification

Why am I not on “the list?”

  • by Dr. William Goble, CFSE
  • Thursday, January 12, 2012
  • News

2011…A Year in Review

  • by Iwan van Beurden, CFSE
  • Tuesday, December 13, 2011
  • Certification

Make a list…and be sure to check it twice

Let me start by wishing everybody a Happy Holidays and Love, Health, Peace, and Safety for 2012. My 5-year old son is very excited about all the holiday decorations. As we celebrate Christmas in my family, we emphasize the birth of baby Jesus as the reason for Christmas, but,…

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  • by John Yozallinas, CFSE
  • Wednesday, December 07, 2011
  • Certification

It Ought to be a Crime

There is no shortage of drivers who try to “beat the red light,” or roll through a stop sign.  I see it every day (luckily BEFORE they hit my side door).  Even though everyone knows, or should know the “rules of the road,” there are some folks who are…

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NEVER Use B10 Values for PFDavg Calculations

The machine safety community has defined a number called the “B10 number.”  It is a measure of time where 10% of a population of devices should have failed.  Generally it is a measure of expected end of life or “useful life” as defined by the reliability engineering community.

The…

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Field Failure Rate: 10 FITS or 1000 FITS?

After analyzing field failure data from hundreds of data sets from dozens of sources, it is becoming easy to see why results from different studies may vary by an order of magnitude or more. The data collection process itself varies by an order of magnitude or more!  A few…

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Do you believe the numbers?

In a couple of recent projects and discussions, I have come across something extremely concerning. Engineers are very good at performing accurate calculations, and the PFDavg and PFH computations for SIL performance verification are improving in precision all the time. Unfortunately, there is often such a focus…

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Two Billion Hours

When I studied Reliability Engineering in graduate school, I was taught that failure rate data came from field failure studies.  I assumed that operating companies always kept accurate records when a piece of equipment failed.  I also assumed that someone would investigate the failures and assign a root cause.…

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Don’t ignore the operator when searching for root cause

Something was wrong with our washing machine.  The wash cycle was longer than normal.  The problem seemed intermittent at first, but then it became persistent across all wash cycles.  Preliminary investigation revealed the cycle got stuck on spin.  Now, I am normally not allowed to operate the washer with…

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