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Excerpt from Practical Guide to Data Migration with SAP S/4HANA Migration Cockpit by Uche Nnene.
A system conversion scenario for transitioning to SAP S/4HANA can be viewed from a concept perspective at least as similar to an upgrade but it is NOT an upgrade (see Figure 2.3). A system conversion can be viewed as a complete technical conversion of an existing SAP Business Suite ERP system to SAP S/4HANA. With this approach, you convert your current ECC system to the new SAP S/4HANA system. This approach can be adopted only on-premise and could be done either in an organization’s own data center or as part of an Infrastructure as a Service (IaaS) model.
An S/4HANA system conversion requires no (real) data migration (i. e., no physical extraction or transformation is required). Instead, a technical data migration that migrates elements such as the material ledger and transaction data to the universal journal as part of the post-S/4HANA conversion step is performed, as shown in Figure 2.2. For those not conversant with the terminology, the universal journal is a ledger of all accounting entries of business transactions in Finance (FI) and Controlling (CO) and it represents the single source of truth in SAP S/4HANA.
Figure 2.2: Migration as part of an S/4HANA conversion
Figure 2.3 provides a diagrammatic representation of the process for converting an existing SAP ECC system, with the steps typically involving:
Figure 2.3: System conversion
Why choose this option? Choose this option if your organization’s strategic goal is to:
You should also choose this option if your organization has no strategic vision for migrating its SAP system to the cloud.
If you work in a company that uses SAP or other non-SAP ERP systems and are looking at migrating to the latest digital core from SAP, whether the cloud or on-premise edition, then this book is for you! Explore your options for transitioning to SAP S/4HANA. Walk in detail through the phases of a data migration project using SAP Activate methodology. Identify SAP rapid data migration best practices for SAP S/4HANA with SAP Data Services. Learn about methods for migrating data to a new SAP implementation scenario, as well as the SAP Data Services architecture that deals with the process of extraction, transformation, and load (ETL) of data. Examine the steps required to execute the migration within the ETL stages and how SAP Data Services can be extended to meet additional migration needs. Take a deep dive into SAP S/4HANA migration cockpit and SAP S/4HANA migration object modeler. Walk through the steps required for migrating data from source systems to SAP S/4HANA (on-premise or cloud edition) using the preconfigured data migration objects delivered by SAP. Delve into the process of creating a migration project and generating the upload template, as well as the steps for uploading and validating the data, including error handling. Review the various migration options and tools available for migrating your legacy data to SAP S/4HANA (on-premise or cloud edition).
Uche Nnene is an experienced SAP finance solution architect and Director UK & Ireland Advisory Services at EY AgilityWorks.
Uche has spent over 15 years working on and implementing SAP ERP solutions across different sectors, including oil and gas, retail, utilities, manufacturing, and public sector organizations (both central and local government).