Statistical charts and diagrams
Bow-tie diagram
A bow-tie diagram, when used in the field of pure (as distinct from speculative) risk, is a partial and simplified model of the process leading to adverse Consequences. A process model of this nature is of use in risk/safety science education and practice as the constituent terms can be defined objectively and comprehensively. The diagram visualises an event (something we did not plan or wish for) that occurs for various reasons and which gives rise to various results which themselves lead to adverse consequences, such as damage, injury, loss. The time sequence of the process (from reasons to event to results etc.) flows from left to right in the diagram. This simple structure should need no explanation, eg. I forgot to buy milk on my way back from work (event), as I was distracted by a phone call (reason) and now I have no milk for breakfast (result). However, it takes on real meaning in understanding risk only if the event is defined carefully. Bow-tie diagrams, often called bow-ties or bowties, have been successful in assisting industries such as in engineering, oil and gas, aviation, industrials, and finance. (Wikipedia).
