[[Image:Barrier types.png|frame|c|right|Defining barrier types based on human or technology barrier.]]
'''Barriers ''' are the safety measures or controls in a [[bowtie diagram]]. Barriers interrupt the scenario so that the threats do not result in the top event, when control is lost over the hazard. Barriers can also ensure that the top event does not escalate into an actual impact (the consequences). Barriers in the bowtie appear on both sides of the top event.
== Type of barriers ==