Estimation

Description

Indicators

High (Probable)

Likely to occur each year or more than 25% chance of occurrence.

Potential of it occurring several times within the time period (for example - ten years). Has occurred recently.

Medium (Possible)

Likely to occur in a ten year time period or less than 25% chance of occurrence.

Could occur more than once within the time period (for example - ten years). Could be difficult to control due to some external influences. Is there a history of occurrence?

Low (Remote)

Not likely to occur in a ten year period or less than 2% chance of occurrence.

Has not occurred. Unlikely to occur.