Which of the following would create the GREATEST risk when migrating a critical legacy system to a new system?
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A. B. C. D.C.
When migrating a critical legacy system to a new system, there are various risks that need to be considered. Of the options given, the option that would create the greatest risk is:
C. Following a direct cut-over approach.
A direct cut-over approach involves switching off the old system completely and switching on the new system at a specific point in time. This approach may seem like the quickest way to migrate, but it also involves the most risk. The risk comes from the fact that if there are any issues with the new system, it can cause a complete system outage, and there will be no backup system to rely on. This can result in loss of critical data, business downtime, and potential loss of revenue. In addition, there is a risk of not being able to fully test the new system in advance, which increases the likelihood of unforeseen issues that can arise when the system is put into production.
On the other hand, using agile development methodology, following a phased approach, or maintaining parallel systems can all mitigate some of these risks. Agile development allows for a more iterative and flexible approach to development, with regular testing and feedback cycles that can help identify and resolve issues early on. A phased approach involves migrating parts of the system gradually, allowing for testing and validation at each stage, reducing the overall risk of failure. Maintaining parallel systems involves running both the old and new systems side by side for a period of time, which allows for a gradual transition and the ability to switch back to the old system if any issues arise.
Overall, while each of these approaches has its own advantages and disadvantages, a direct cut-over approach poses the greatest risk when migrating a critical legacy system to a new system.