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Zorluk: ZorBusiness Impact Analysis and Business Continuity Management

A logistics enterprise is updating its business continuity management plan for its central warehouse execution system. A Business Impact Analysis (BIA) determines that data loss exceeding 15 minutes will cause unrecoverable state desynchronization across automated sorting units, while the system can remain completely offline for up to 6 hours before contract penalties take effect. The infrastructure team proposes a disaster recovery architecture utilizing asynchronous backup replication every 4 hours and an automated failover process that restores application availability within 2 hours. Which of the following statements correctly evaluates the proposed disaster recovery plan against the organization's business metrics?

  1. The proposed architecture fails to meet the Recovery Point Objective (RPO) because 4-hour replication permits up to 4 hours of data loss, exceeding the 15-minute threshold.Cevap
  2. B
    The proposed architecture fails to meet the Recovery Time Objective (RTO) because bringing the environment online in 2 hours exceeds the 15-minute operational limit.
  3. C
    The proposed architecture satisfies both the Recovery Point Objective (RPO) and Recovery Time Objective (RTO) because 2-hour restoration is well within the 6-hour window.
  4. D
    The asynchronous replication mechanism serves as a compensating preventive control that reduces the Maximum Tolerable Downtime (MTD).

Cevap

The proposed architecture fails to meet the Recovery Point Objective (RPO) because 4-hour replication permits up to 4 hours of data loss, exceeding the 15-minute threshold.
The correct answer identifies that the 15-minute maximum tolerable data loss parameter represents the organization's Recovery Point Objective (RPO). Performing asynchronous backups every 4 hours leaves up to a 4-hour window of lost transactions during a crash, directly breaching the 15-minute RPO requirement.

Adım Adım Çözüm

1
Identify the key metrics defined by the Business Impact Analysis (BIA)
The maximum allowable data loss timeframe is 15 minutes, which establishes the Recovery Point Objective (RPO) = 15 minutes. The maximum acceptable system offline duration is 6 hours, establishing the Recovery Time Objective (RTO) / Maximum Tolerable Downtime (MTD) = 6 hours.
BIA metrics separate acceptable data loss (RPO) from acceptable system downtime (RTO).
2
Analyze the proposed disaster recovery architecture parameters
Replication interval = 4 hours (potential data loss up to 4 hours). Restoration time = 2 hours (system offline time of 2 hours).
Replication frequency defines the actual data loss window, whereas failover restoration time defines the actual downtime.
3
Compare actual recovery parameters against required business metrics
The 2-hour restoration time meets the 6-hour RTO target (2 hours≤6 hours2 \text{ hours} \le 6 \text{ hours}). However, the 4-hour replication interval violates the 15-minute RPO requirement (4 hours>15 minutes4 \text{ hours} > 15 \text{ minutes}).
A valid continuity plan must satisfy both RTO and RPO requirements simultaneously.

Anahtar Kavram

Distinction between Recovery Point Objective (RPO) and Recovery Time Objective (RTO) in Business Impact Analysis
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Konular

Business Impact Analysis and Business Continuity Management

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