Herbert W. Heinrich was a pioneering occupational safety researcher, whose 1931 publication, Industrial Accident Prevention: A Scientific Approach [Heinrich 1931] was based on the analysis of accident data collected by his employer, a large insurance company.
The Heinrich/Bird safety pyramid is presented in an article in Risk Engineering. It includes an infographic with Heinrich's Accident Triangle. This triangle suggests that the ratio between fatal accidents, accidents, injuries and minor incidents are similar across all industries. It highlights the importance of investigating the minor incidents to present fatal incidents.
In healthcare, are we investigating the wrong incidents?