“Actions taken and measures put in place for the continual assessment and readiness of necessary actions to reduce risk of threats and vulnerabilities, to intervene and stop an occurrence, or to mitigate effects. Extended definition: involves prescribed actions and measures put in place to impede the success of a natural or man-made disaster from adversely affecting the safety, security, or continuity of the Nation, critical infrastructures its citizens, and citizen’s civil rights or civil liberties.”
Reference: DHS, Lexicon: Terms and Definitions, October 19, 2007, p. 20
“Measures that enable an organization to avoid, preclude, or limit the impact of a disruption.”
Reference: ISO 22399
“Activities to avoid an incident or to stop an emergency from occurring.”
“Activities, tasks, programs, and systems intended to avoid or intervene in order to stop an incident from occurring. Prevention can apply both to human-caused incidents (such as terrorism, vandalism, sabotage, or human error) as well as to naturally occurring incidents. Prevention of human-caused incidents can include applying intelligence and other information to a range of activities that includes such countermeasures as deterrence operations, heightened inspections, improved surveillance and security operations, investigations to determine the nature and source of the threat, and law enforcement operations directed at deterrence, preemption, interdiction, or disruption.”
Reference: NFPA 1600, 2007
Note: In process safety preventive measures are distinguished from protective and mitigative measures. Preventive measures prevent an initiating event, a release from happening.