Transcript: Risk assessment matrix

Y-Axis (Left-hand column) – Consequence

If the event occurs, how seriously could it harm people?

Severe:

Fatality or permanent disability.

Major:

Serious injury requiring medical attention.

Moderate:

Minor injury requiring medical attention.

Low:

On-site first aid required.

Negligible:

Minor discomfort or inconvenience.

X-Axis (Top row) – Likelihood

How likely is the hazard event to occur?

Very likely.

Likely.

Possible.

Unlikely.

Very unlikely.

Risk ratings:

• Hazard consequence is Severe and likelihood is Very likely – Risk rating is Extreme.
• Hazard consequence is Severe and likelihood is Likely – Risk rating is High.
• Hazard consequence is Severe and likelihood is Possible – Risk rating is High.
• Hazard consequence is Severe and likelihood is Unlikely – Risk rating is High.
• Hazard consequence is Severe and likelihood is Very unlikely – Risk rating is Medium.

• Hazard consequence is Major and the likelihood is Very likely – Risk rating is High.
• Hazard consequence is Major and the likelihood is Likely – Risk rating is High.
• Hazard consequence is Major and the likelihood is Possible – Risk rating is High.
• Hazard consequence is Major and the likelihood is Unlikely – Risk rating is Medium.
• Hazard consequence is Major and the likelihood is Very unlikely – Risk rating is Medium.

• Hazard consequence is Moderate and the likelihood is Very likely – Risk rating is High.
• Hazard consequence is Moderate and the likelihood is Likely – Risk rating is Medium.
• Hazard consequence is Moderate and the likelihood is Possible – Risk rating is Medium.
• Hazard consequence is Moderate and the likelihood is Unlikely – Risk rating is Medium.
• Hazard consequence is Moderate and the likelihood is Very unlikely – Risk rating is Medium.

• Hazard consequence is Low and the likelihood is Very likely – Risk rating is Medium.
• Hazard consequence is Low and the likelihood is Likely – Risk rating is Medium.
• Hazard consequence is Low and the likelihood is Possible – Risk rating is Medium.
• Hazard consequence is Low and the likelihood is Unlikely – Risk rating is Low.
• Hazard consequence is Low and the likelihood is Very unlikely – Risk rating is Low.

• Hazard consequence is Negligible and the likelihood is Very likely – Risk rating is Medium.
• Hazard consequence is Negligible and the likelihood is Likely – Risk rating is Medium.
• Hazard consequence is Negligible and the likelihood is Possible – Risk rating is Low.
• Hazard consequence is Negligible and the likelihood is Unlikely – Risk rating is Low.
• Hazard consequence is Negligible and the likelihood is Very unlikely – Risk rating is Low.