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Safety Management System (SMS)

Also known as: Safety Management System

A Safety Management System (SMS) is a structured, organisation-wide approach to managing safety risk, encompassing the policy, accountabilities, hazard identification, risk assessment and assurance processes that an aviation organisation uses to manage safety proactively. It is mandated internationally under ICAO Annex 19 and is the foundation for tools such as the flight risk assessment tool.

Reviewed by AeroVigil Analysis Desk · 2026-05-31

An SMS is built on four components: safety policy and objectives, safety risk management, safety assurance, and safety promotion. Rather than treating safety as a matter of reacting to accidents, an SMS requires an organisation to identify hazards systematically, assess and mitigate the associated risk, and then monitor whether those mitigations remain effective. It establishes clear safety accountabilities, encourages confidential reporting of hazards, and treats safety performance as something to be measured and improved continuously.

ICAO consolidated safety management provisions into Annex 19 to the Chicago Convention, which requires service providers — including operators, approved organisations and airports — to implement an SMS acceptable to their state, while states themselves maintain a corresponding State Safety Programme. Although SMS is rooted in the safety discipline rather than security, its risk-based methodology has become the model for structured pre-flight risk evaluation across operations.

The flight risk assessment tool (FRAT) is a direct application of SMS thinking, scoring the cumulative risk of a planned flight from defined factors. Where those factors include security-relevant conditions, intelligence sources such as AeroVigil can inform the inputs, helping risk management reflect the current threat picture as well as conventional safety hazards.

Frequently asked

What are the four components of a Safety Management System?
An SMS comprises safety policy and objectives, safety risk management, safety assurance, and safety promotion. Together they provide a structured framework for identifying hazards, mitigating risk and verifying that controls remain effective.
Which ICAO annex governs Safety Management Systems?
ICAO Annex 19 governs safety management. It consolidates the SMS requirements for service providers and the State Safety Programme requirements for states into a single annex to the Chicago Convention.

Related terms

Sources

  • ICAO Annex 19 — Safety Management
  • ICAO Doc 9859 — Safety Management Manual