Certified Information Security Manager (CISM) — Question 1225

Which of the following parameters is MOST helpful when designing a disaster recovery strategy?

Answer options

• A. Maximum tolerable downtime (MTD)
• B. Mean time between failures (MTBF)
• C. Allowable interruption window (AIW)
• D. Recovery point objective (RPO)

Correct answer: A

Explanation

The Maximum tolerable downtime (MTD) is crucial because it defines the longest period a system can be down before causing significant harm to the organization. While Mean time between failures (MTBF), Allowable interruption window (AIW), and Recovery point objective (RPO) are important metrics, they do not provide the same level of insight into the overall acceptable downtime for the business operations.