Which of the following is used to identify potential issues with a proposed change prior to implementation?

A request form is typically used to formally document a proposed change and gather necessary approvals. While it may outline the details of the change, it does not actively identify issues or evaluate the impact of the change itself. Therefore, it is not a direct method for testing or assessing potential problems prior to implementation.

A rollback plan is designed to revert changes if they cause problems after implementation. While it is a critical part of change management to ensure recovery from failures, it does not proactively identify issues before a change is applied. Its purpose is reactive rather than preventive, focusing on recovery rather than evaluation.

End-user acceptance testing involves users validating the functionality of a change after it has been implemented. This process confirms whether the change meets user requirements and expectations. However, like the rollback plan, it occurs after implementation, making it unsuitable for identifying potential issues beforehand.