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Artificial Intelligence Notice: ISA prohibits the entry of ISA standards and related ISA intellectual property (“ISA IP”) into any form of Artificial Intelligence (AI) tools, such as ChatGPT. Additionally, creating derivatives of ISA IP using AI is also prohibited without express written permission from ISA’s CEO. In the case of such use, ISA will suspend a licensee’s access to ISA IP, and further legal action will be considered. Please review ISA's Terms and Conditions for further information.

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ISA91, Criticality Ranking for Instrumentation

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The ISA91 Committee, Criticality Ranking for Instrumentation, was merged in late 2007 as a working group into ISA84, Electrical/Electronic/Programmable Electronic System (E/E/PES) for Use in Process Safety Applications. For information about the former committee or about ISA84, please contact ISA Standards.