exida explains Blog

Entries tagged with: Alarm Management

The Problem with the Expert
  • by Dr. William Goble, CFSE
  • Wednesday, March 05, 2014
  • Certification

The Problem with the Expert

I recall the first time I was called an “expert.”  I thought that sounded nice. I spotted a magazine article on safety and thought “I do not have to read that as I am an expert.” I quickly recovered.  The real problem with being called an expert is that…

Read More...

Training in 2020 and Beyond.  Adapting to COVID-19 with Online Solutions.
  • by Rick Smith
  • Tuesday, March 31, 2020
  • News

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

What do Nuisance Alarms, the 80-20 Rule, Mental Models, and More Have in Common?

What do Nuisance Alarms, the 80-20 Rule, Mental Models, and More Have in Common?

Most everyone has heard of the “80-20 rule”.  It asserts that for many situations, roughly 80% of the effects (outcomes) come from 20% of the causes (inputs).  This rule was first proposed in the early 1900s by Vilfredo Pareto, who was an Italian engineer, sociologist, economist, political scientist, philosopher,…

Read More...

When is an Alarm not an Alarm?

When is an Alarm not an Alarm?

The ISA-18.2 and IEC 62682 standards define an alarm as an “audible and/or visible means of indicating to the operator an equipment malfunction, process deviation, or abnormal condition requiring a timely response”.  One of the reasons why alarm systems are out of control (alarm overload, nuisance alarms)…

Read More...

When is an Independent Protection Layer (IPL) Not a Safeguard?

We are going to continue discussing the results from exida‚Äôs recently published industry benchmark survey on the practices for the use of alarms as safeguards and IPLs. Over 200 safety practitioners from around the world provided responses. This entry will discuss the relationship between alarms identified as safeguards and…

Read More...

Which Measure (Rationalized or Annunciated) is More Important?

Which Measure (Rationalized or Annunciated) is More Important?

Get your priorities (distribution) straight

A very common question is posed during alarm management training.  Does the recommended alarm priority distribution of ~5% / ~15% / ~80% for high / medium / low priority alarms apply to the rationalized alarm priority distribution (as configured in the control system) or to the annunciatedalarm priority distribution…

Read More...

Why should I use an Alarm Deadband?

Why should I use an Alarm Deadband?

As many of you will know, one of the most common form of nuisance to operators working industrial controls are repeating or chattering alarms. On a typical plant, repeating alarms may account for around 50% of the alarm annunciations. They are a problem because the operator will have to…

Read More...