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Entries tagged with: Pha

Alarm Rationalization is “Going Green (field)”

With the growing adoption of the ISA-18.2 standard on alarm management, industry leaders are increasingly implementing alarm management best practices (such as alarm rationalization) during the upfront design, before they start up control systems for new, “Greenfield” installation. There are numerous benefits. You think alarm overload and nuisance alarms…

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PHA to LOPA: Part I

Parts I and II of this article provide a framework for when it is appropriate to make the transition from qualitative analysis to more quantitative during the hazard review work process. It further illustrates that LOPA can be used as part of what is considered more qualitative analysis…

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PHA to LOPA: Part II

In some cases the screening methods will indicate that a SIF is needed. These screening methods can be designed to determine how many orders of magnitude risk reduction is needed, allowing a required SIL to be documented for a particular SIF. The screening…

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exida explains

The exida explains blog has been around for over five years and gives expert and sometimes candid insight into the world functional safety, alarm management, and industrial cybersecurity.

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Alarm Management CFSE Cybersecurity cybersecurity Dr. William Goble exida exSILentia Failure Rates FMEDA Functional Safety functional safety IEC 61508 IEC 61511 IEC 62443 IEC61511 ISA-18.2 Iwan van Beurden John Yozallinas Loren Stewart Patrick O'Brien PFDavg PLC safety lifecycle SIF SIL silsafe SIS Steve Gandy Ted Stewart Todd Stauffer