An unsafe act is a behavior or action that has the potential to cause harm or injury to oneself or others.
Hazard define as any event with the potential to cause harm, damage property, environment.
Risk is the likelihood of a specific undesired event occurring with in specified period.
R=P *S
An event did not result in an accident
Near Miss
Accident is an unexpected event
Accident
Injury that result in death, loss of consciousness
Injury
An unsafe condition is a situation that has the potential to cause harm or injury to people, damage to property, environment.