Which safety drawing helps you see how an accident can happen, what stops it, and what happens if it does?

The safety drawing that helps you see how an accident can happen, what stops it, and what happens if it does is a Bow-Tie Diagram. A Bow-Tie Diagram is a risk assessment method that visually connects the potential causes of an accident, the measures in place to prevent it, the actual event of control loss, and the subsequent potential outcomes along with the measures to reduce their impact. It is structured around a central undesired event, representing the 'knot' of the bow-tie, with two symmetrical sides. On the left side, the diagram identifies the hazard, which is any source with the potential to cause harm or adverse effects. Connected to the hazard are threats, which are the specific events or conditions that could lead to the loss of control over the hazard, illustrating 'how an accident can happen'. Between these threats and the central undesired event are preventive barriers, which are controls, systems, or actions designed to stop the threats from escalating into the central event, thereby showing 'what stops it' before the accident occurs. Examples of preventive barriers include safety procedures, automated shutdown systems, or routine maintenance. The central point of the diagram is the top event (or undesired event), which signifies the moment when control over the hazard is lost, such as a chemical release or machinery failure. On the right side of the diagram, the consequences are depicted, which are the potential undesirable outcomes or impacts that could result from the top event, detailing 'what happens if it does'. Examples of consequences include injuries, environmental damage, or property loss. Between the top event and these consequences are mitigative barriers (also known as recovery barriers), which are controls, systems, or actions implemented to reduce the severity or likelihood of the consequences after the top event has already occurred, thus showing 'what stops it' from getting worse once an accident has started. Examples of mitigative barriers include emergency response plans, personal protective equipment, or spill containment systems.