In what scenario would a parallel conversion strategy be utilized?

A parallel conversion strategy is utilized when both the old and new systems operate simultaneously for a period of time during the transition phase. This approach allows organizations to mitigate risks by maintaining the old system as a backup while users become accustomed to the new system. It offers the ability to compare results from both systems, ensuring that the new system functions correctly and meets the required needs before fully committing to it. This strategy also provides a safety net to revert to the old system if unexpected issues arise with the new implementation.

The other options describe different conversion strategies. For instance, rolling out the new system organization-wide at once refers to a direct or big bang approach, while testing the new system with a single department indicates a pilot conversion method. Discontinuing the old system immediately describes a direct cutover strategy, which can pose significant risks without the safeguards that parallel conversion provides.