Certified in Risk and Information Systems Control (CRISC) — Question 1431

Which of the following would be the GREATEST risk associated with conducting a parallel run during the replacement of a legacy system?

Answer options

• A. Loss of skills associated with the legacy system
• B. Undetected data inconsistency
• C. Lack of change management for new requirements
• D. Insufficient resource availability

Correct answer: B

Explanation

The greatest risk is undetected data inconsistency, as running two systems simultaneously can lead to discrepancies that are not identified. While loss of skills, lack of change management, and insufficient resources are important concerns, they do not pose as immediate a threat to the integrity of the data as the potential for inconsistencies between the legacy and new system.