The probability circular ruler "PCR" (process safety metrics). Issue 2 (21st March 2016)

• Record Type: Journal Article
• Authors: Blanco, Roberto Fernández
• Is Part Of: Process safety progress. Volume 35:Issue 2(2016:Jun.)
• Page Start: 124
• Page End: 136
• Publication Date: 2016-03-21
• Subjects: process safety management -- probability of failure on demand -- Swiss cheese model -- probability circular ruler -- risk reduction factor -- safety integrity level -- HIRA -- layer of protection -- inherently safer design; Chemical plants -- Management -- Periodicals; 660
• DOI: 10.1002/prs.11817
• Languages: English
• ISSNs: 1066-8527

Abstract

Abstract : The explanation of process safety protection layers and related probability of failure does not need to be complicated. This article shows visuals that can be used to explain the complexity of safety layers and their relationship to reduce the risk of an overall incident. It is proposed that the "Swiss Cheese Model" be replaced with a more realistic probability wheel referred to as the probability circular ruler, leading to usable information to be included in the P&ID as tagging labels with safety data of the process protecting device. © 2016 American Institute of Chemical Engineers Process Saf Prog 35: 124–136, 2016