The Use of Bow Ties in Process Safety Auditing

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How-to-Perform-Bow-Tie-Analysis

Figure 2 .

All about Bowties
Introduction
Bowties are diagrams representing the relationship between an unwanted event, its potential causes, its consequences and the controls in place, as shown below in Figure 1.
Figure 1: Bowtie schematic
Bowties are thought to have originated in the late sin ICI (Imperial Chemical Industries. However it was not until the early s, that Shell became the first company to incorporate bowties into its operations. Following Shell, the bowtie method started to be widely used throughout the oil and gas industry, as bowties became known as a powerful visual tool to aid risk management (Lees, 2005).

SYMPOSIUM SERIES NO 161 HAZARDS 26
© 2016 IChemE
2 In the last decade the bowtie method has also spread to other industries including aviation, mining, maritime, chemical and healthcare, e.g.(CAA website, 2015, Kerkhoffs , 2015) Atypical bowtie diagram is shown below in Figure 2.

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