The Definition of Unplanned Event
An unplanned event in workplace safety is any unexpected occurrence, such as a near-miss or incident, that deviates from normal operations.
An unplanned event in workplace safety is any unexpected occurrence, such as a near-miss or incident, that deviates from normal operations.

Any occurrence that deviates from normal, expected operations without prior planning — ranging from a minor near-miss with no injury to a significant incident causing harm or property damage — that warrants investigation to understand its cause.
A pallet unexpectedly shifts and falls from a forklift in an otherwise clear aisle; although no one is injured, the event is logged and investigated as an unplanned event to identify the root cause.
A near-miss is one type of unplanned event — specifically one where no injury or damage occurred — while "unplanned event" is a broader term that can also include incidents that did result in harm.
Investigating near-misses and other unplanned events helps identify underlying hazards or process gaps before they result in a more serious incident.
Most organizations use a standardized reporting form capturing what happened, contributing factors, and corrective actions, often feeding into a broader incident tracking system.