The preparation phase of an SAP S/4HANA conversion project involves all activities required to ensure the source system is ready for the technical conversion process managed by the Software Update Manager (SUM).

C. Check the compatibility of custom code with SAP S/4HANA: This is a critical preparation task. Before the conversion, custom ABAP code must be analyzed using tools like the ABAP Test Cockpit (ATC) to identify incompatibilities with the new S/4HANA data model, simplified objects, and HANA-specific syntax. This analysis is essential for planning the remediation effort.

D. Solve problems from the simplification item (SI) checks: The Simplification Item Check is a mandatory readiness check run during the preparation phase. It identifies required data consistency fixes and other mandatory preparation activities. The SUM tool will not proceed to the execution phase until critical issues, particularly consistency-related problems identified by these checks, are resolved in the source system.

A. Perform the migration of data to the new data structure: This is a core activity of the technical conversion itself, which occurs during the downtime (Execution phase) and is performed by the SUM tool.

B. Run the database migration to the SAP HANA database: This task is part of the technical conversion (Execution phase), handled by the Database Migration Option (DMO) of the SUM tool, not a preparation step.

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1. SAP S/4HANA 2023 Conversion Guide

Chapter 3: "Preparation". This chapter outlines the mandatory steps before starting the Software Update Manager (SUM).

Section 3.2

"Simplification Item Check

" states: "You must run these checks on your system to find out which steps you have to take before

during

and after the conversion. You have to resolve the issues that the check identifies before you can start the conversion." This directly supports option D.

Section 3.3

"Custom Code Preparation

" details the process of using the ABAP Test Cockpit (ATC) to check custom code for SAP S/4HANA and SAP HANA readiness. This directly supports option C.

2. SAP Activate Methodology for Transition to SAP S/4HANA

"Prepare Phase". The official project methodology roadmap includes the following key tasks within the Prepare Phase:

Perform Simplification Item Check: This task involves running the check and analyzing the results to plan for resolution. The resolution of mandatory consistency checks is a prerequisite to exit the phase.

Perform Custom Code Evaluation: This task focuses on running the ATC to analyze the impact on the custom code base and plan the adaptation project.

3. SAP Help Portal - Simplification Item Check

Document Version: 2023 (S/4HANA). The documentation specifies: "The Simplification Item check performs the relevance and consistency checks... The results of the consistency check have to be solved before the conversion

otherwise the conversion will stop in an early phase." This confirms that solving these specific problems (D) is a mandatory preparation activity.