Which of the following is a typical challenge faced during the 'cutover' phase?

During the cutover phase of an SAP S/4HANA implementation, one of the most critical challenges involves last-minute data migration issues. This phase represents the transition from the legacy system to the new SAP system, and it is vital to ensure that all necessary data is accurately and completely migrated.

Last-minute issues might arise from several factors, such as incomplete data extraction, discrepancies in data formats, or unexpected data quality issues that were not identified during earlier project phases. These challenges can lead to delays in the go-live schedule if not managed properly, as data integrity is crucial for the successful functioning of the new system and to avoid disruptions in business processes.

The other options do present valid concerns in broader contexts but are less typical challenges in the cutover phase itself. For instance, while over-preparation of the rollout team may lead to resource inefficiencies, it is less likely to obstruct the actual transition compared to data migration issues. Similarly, while excessive end-user training can consume valuable time, it is not typically characterized as a challenge specific to the cutover phase. Lastly, although communication issues between vendors can complicate projects, they do not generally manifest as direct challenges during the cutover phase where data migration takes precedence.