A traditional view of events and accidents is that they are caused by human competence, attention, or attitude shortcomings. It may be under the label of “loss of situation awareness,” “procedural violation,” or “poor management”. A new and different view is that human error is NOT the cause of failure but a SYMPTOM OF FAILURE – trouble deeper inside the system. Human error is not the chief threat to safety; latent organizational conditions set the stage for error and determine the severity of the consequences.