In which of the following scenarios is SAP expert sizing necessary?

SAP expert sizing is particularly crucial when carving out ERP functionality from a source system to an ERP on SAP HANA because this process involves careful consideration of the existing data and its operational impact. Sizing helps ensure that the new SAP HANA environment is adequately provisioned in terms of hardware resources, such as CPU, memory, and storage, to effectively handle the data workloads expected from the carved-out processes.

In scenarios where ERP functionality is being moved, expert sizing takes into account not just the volume of data but also the performance requirements, potential growth, and specific usage patterns of the applications. This is essential to optimize system performance and ensure that the new setup operates smoothly without performance bottlenecks.

In contrast, upgrading from SAP HANA 1.0 to 2.0 and implementing a new ERP system may involve different considerations, such as compatibility and feature enhancements rather than specifically sizing based on usage patterns of carved-out functionality. Integrating third-party applications focuses more on interfaces and data flow rather than the underlying sizing of the core system. Therefore, while these scenarios may require careful planning, the unique needs tied to carving out ERP functionality make expert sizing particularly necessary in that context.