Serious injury and fatality (SIF) is a safety term for outcomes involving death or severe injury, commonly including life-threatening or life-altering harm. Organizations use SIF prevention approaches to focus attention on exposures capable of producing these outcomes. The precise criteria for a serious injury vary across organizational frameworks and should be defined consistently within a safety program.
The concept directs attention toward the potential consequence of hazardous exposure. In industrial traffic, interaction with moving equipment can carry severe consequences even when previous similar events have not caused recorded harm.
Actual SIF outcomes and potential SIF events should be distinguished. An event without injury may still have had credible potential for severe harm, while an injury of lower severity does not automatically indicate that the exposure carried SIF potential.
Consistent classification helps teams compare events and prioritize controls. The definition used by an organization should be stated clearly and should not be assumed to replace the specific injury-reporting criteria of a regulator or jurisdiction.