Below is a small screencast of our Online bowtie practitioner course, in which we did a bowtie on employee kidnapping, and came across an interesting issue. We had barriers with multiple levels of detail. But ideally, the barriers in a bowtie are on the same level of detail. It's not
A study described in the book Controlling the Controllable (Groeneweg, 2002, p. 88-89, experiment 2) looked at the ability of incident analysts to distinguish relevant from irrelevant information. The results are intriguing and may put our own incident analyses into perspective. The experiment Participants were divided into two main groups:
James Reason's classic book Managing the Risks of Organizational Accidents has a lot of great risk management insights. Here are three paragraphs on adding too many procedures over time (p. 49): All organizations suffer a tension between the natural variability of human behaviour and the system's needs for a high
The best definition of a safety barrier can be found in an article by Sklet from 2006: Safety barriers are physical and/or non-physical means planned to prevent, control, or mitigate undesired events or accidents. This definition has an interesting word. Planned. It implies that besides stopping unwanted events, a
* Sklet, S. (2006). Safety barriers: Definition, classification, and performance. Journal of Loss Prevention in the Process Industries, 19(5), 494–506.
Which risk barriers are the most important? This question can be answered with barrier criticality. In this article we discuss why & how to approach barrier criticality as well as some challenges.
It can be a challenge to know what to use bowties for. In this webinar we show different practical applications of bowties. From risk communication to barrier monitoring and decision support.
I hope you'll forgive me, but I don't really like 5-why. It's a decent methodology, but I think there are better options. Instead, we can use barrier-based incident analysis methods. Why is this better? Well, here are 5 reasons why I think analysing barrier failures is better than 5-why.
In theory all threats in a bowtie diagram can cause the top event, and the top event can cause all consequences. But sometimes a threat can't lead to all consequences. Why is that and is it a problem?
Many organisations have adopted the idea of barrier management in safety. Many are also searching for ways to take a next step. With the barrier maturity model you can determine where your organisation currently is and see which steps can be taken to mature to a higher level of barrier management.