Glossary: CompTIA Security+ SY0-801 Exam Prep
ARO (Annualized Rate of Occurrence)
How many times a year an incident is expected. Once every N years is 1 ÷ N, so once every 4 years is 0.25.
Where the book teaches it
Related terms
ALE (Annualized Loss Expectancy)SLE (Single Loss Expectancy)