Bowtie is one of barrier risk models available to assist the identification and management of risk!
The diagrams clearly display the links between the potential causes, preventative and mitigative controls and consequences of a major accident. Bow-tie diagrams may also be integrated with semi-quantitative analysis techniques.
This primer on Bow-Tie Risk Assessment identifies bowtie elements and describes how this method has been implemented in Galiot SMS
A Premier on Bow-Tie Risk Assessment