exida explains Blog

Entries tagged with: Todd Stauffer

  • by Todd Stauffer
  • Tuesday, March 15, 2016
  • Software

PRODUCT SPOTLIGHT: SILAlarm V2.10 - Alarm Flood Suppression


The ISA-18.2 and IEC 62682 alarm management standards provide recommended targets for average alarm rate and for alarm floods - a condition during which the alarm rate is greater than the operator can effectively manage (e.g., more than 10 alarm per 10 mins)…

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The Importance of Process Safety to the next Generation of Chemical Engineers

The Importance of Process Safety to the next Generation of Chemical Engineers

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,…

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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)…

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

We are going to continue discussing the results from exida’s 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…

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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…

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