What would be the Annualized Rate of Occurrence (ARO) of the threat "user input error", in the case where a company employs 100 data entry clerks and every one of them makes one input error each…

The correct answer is D. 1200. If every one of the 100 clerks makes 1 error 12 times per year, it makes a total of 1200 errors. The Annnualized Rate of Occurence (ARO) is a value that represents the estimated frequency in which a threat is expected to occur. The range can be from 0.0 to a large number…

Submitted by olafpl· Apr 18, 2026Risk Identification, Monitoring and Analysis

Question

What would be the Annualized Rate of Occurrence (ARO) of the threat "user input error", in the case where a company employs 100 data entry clerks and every one of them makes one input error each month?

Options

A100
B120
C1
D1200

How the community answered

(27 responses)

A
7% (2)
B
11% (3)
C
4% (1)
D
78% (21)

Explanation

If every one of the 100 clerks makes 1 error 12 times per year, it makes a total of 1200 errors. The Annnualized Rate of Occurence (ARO) is a value that represents the estimated frequency in which a threat is expected to occur. The range can be from 0.0 to a large number. Having an average of 1200 errors per year means an ARO of 1200

Topics

#Annualized Rate of Occurrence (ARO)#Quantitative Risk Analysis#Risk Calculation#Threat Occurrence

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