In the past, the term "accident" was often used when referring to an unplanned, unwanted event. To many, "accident" suggests an event that was random, and could not have been prevented. Since nearly all worksite fatalities, injuries and illnesses are preventable, the Occupational Safety and Health Administration (OSHA) suggests using the term "incident" investigation. Root causes of incidents are broken down into three levels: direct cause, indirect cause and basic cause. A direct cause is the result of physical contact with an object or hazardous substance and is usually the result of one or more unsafe acts, unsafe conditions or both. […]