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Training in 2020 and Beyond.  Adapting to COVID-19 with Online Solutions.

Training in 2020 and Beyond.  Adapting to COVID-19 with Online Solutions.

Hey everybody. I hope this blog finds you, your family, and your colleagues well. At exida, we appreciate the trust you place in our solutions and services to support you in achieving your Read More...

Bow Ties Part II: Do Bow Ties have a place in Alarm Management?

Bow Ties Part II: Do Bow Ties have a place in Alarm Management?

As discussed in Part I, bow tie diagrams provide an easy-to-understand visual representation of risk management information (hazards, potential consequences, barriers, degradation factors and controls). In this article we examine the applicability of…

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Back to Basics: Failure Rates - λ

Back to Basics: Failure Rates - λ

The Greek symbol lambda, λ, represents failure rates in functional safety, usually expressed in the unit of measurement of FITS.

λ can be expressed as a total failure rate for a device (λT), or it…

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The CFSE Exam is Now Offered Online!

The CFSE Exam is Now Offered Online!

Alarm Philosophy Development – Going to Great Lengths

Alarm Philosophy Development – Going to Great Lengths

Creating an alarm philosophy document is often the entry point into the ISA-18.2/IEC 62682 alarm management lifecycle. Many tasked with developing one are discouraged by its length and the barriers it creates.…

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Back to Basics: Failure Rates - FITS

Back to Basics: Failure Rates - FITS

Failures ITime or Failure UnIT

FITs is the number of failures per billion hours for a piece of equipment. 

It is mentioned in both IEC 61508 and IEC 61511 standards as a preferred unit of measurement…

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I Failed the CFSE Exam, HELP!

I Failed the CFSE Exam, HELP!

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…

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Back to Basics: Failure Rates

Back to Basics: Failure Rates

Failure rates are the number of failures per unit time for a piece of equipment which are usually assumed to be a constant value. They can be broken down into several categories, such as…

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Bow Ties Part I: Great for Formal Occasions and for Risk Management

Bow Ties Part I: Great for Formal Occasions and for Risk Management

The bow tie methodology, originally developed by ICI in the late 1970’s, has seen increasing industry adoption over the last 20 years. Bow tie diagrams build on the “Swiss Cheese Model” of hazard escalation…

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Psychometrics – Another reason CFSE remains the Gold Standard

Psychometrics – Another reason CFSE remains the Gold Standard

In today’s day and age, functional safety certificate and certification programs are becoming common. There are many to choose from with their own set of requirements and expectations.  

So how do we know which one…

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Back to Basics 23 – Stiction

Back to Basics 23 – Stiction

What is Stiction? 

stiction

Stiction is the resistance to the start of motion usually measured as the difference between the external force being applied in order to overcome the static friction…

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Why Bother With Systematic Issues?

Why Bother With Systematic Issues?

You may be wondering why this question is being asked?  Isn’t it obvious that systematic issues are important and need to be considered?  It may be that some of you reading this blog may not even…

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Back to Basics 22 – Cycle Testing

Back to Basics 22 – Cycle Testing

A cycle test is done on a set of products (>20) until 10% of the units under test fail. 

The number of cycles is converted to a time period by knowing the cycles per…

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ISO 26262 Independence and Related Terms

ISO 26262 Independence and Related Terms

Back to Basics 21 – The B10 Method

Back to Basics 21 – The B10 Method

The B10 method uses cycle test data to predict failure rates. 

A cycle test is done on a set of products (>20) until 10% of the units under test fail. The number of cycles until…

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