S4HANA Migration Overview
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The document discusses SAP S/4HANA migration from SAP ERP. Key points include: 1) SAP S/4HANA leverages SAP HANA as the underlying platform for real-time processing and simplified data models. 2) There are multiple upgrade paths for migrating from SAP ERP, including upgrading the database to SAP HANA and installing additional code for new capabilities. 3) The migration process involves preparation, installation, customization, data migration, and post-migration activities like reconciliation to ensure accuracy. Testing is critical before migrating production systems.
S4HANA Migration Overview
- 2. S/4HANA Key Enablers SAP HANA SAP Fiori Real Time & Simplified SAP HANA as underlying platform: •OLTP & OLAP merge •In-memory compression •Increase in speed • SAP Fiori as user experience (UX) Paradigm • Unified cross-application user experience •Web based, all devices •Role based Simplified of underlying data models: •No Aggregates & No Indices •Higher throughput •Higher flexibility •Data footprint reduction
- 4. Migration from SAP Business Suite on Any Database 1 PLAN Scope migration effort and identify key business scenarios For customers already on SAP ERP 6.0, upgrading to SAP S/4HANA Finance is done in four phases 1 1 Upgrade Upgrade to Enhancement Package 7 and Unicode data type 2 OS DB Migration Install and migrate database to SAP HANA 3 Install Install Innovation package (add-on/new code) 4 •The technical upgrade procedure is based on SAP’s Software Update Manager (SUM) using the database migration option (DMO) and near-zero downtime maintenance (nZDM) capabilities as part of SUM.
- 5. ECC Upgrade & HANA DB Migration Traditional DB ABAP 7.x ECC 6 EHP x Kernal 7.x SAP Frontend Traditional DB ABAP 7.4 ECC 6 EHP 7 Kernal 7.4 SAP Frontend HANA DB ABAP 7.4 ECC 6 EHP 7 SAP Frontend BOBJ HTML5 Upgrade HANA DB Migrate
- 6. High Level Project Planning – DB Migration M1 M2 M3 M4 M5 Preparation & Planning HANA Assessment Execute readiness checks Conduct Hardware Sizing Finalize Migration Option (DMO) & Upgrade steps Update SP Install & upgrades required HANA Installation of hardware HANA Install & Set up Conduct HANA health check HANA Migration & Testing Prod client Copy to Sandbox Sandbox HANA DB migration Functional Testing & Technical Validation Checkpoint & lessons learned Development Box HANA DB migration Functional Testing & Technical Validation Prod client Copy to QA QA Box HANA DB Migration Functional Testing & Technical Validation UAT / Regression Testing (Business users involved) Deploy Back-up Production and contingency planning PROD box HANA DB Migration Cutover Activities Perform Go-Live Support Support Key Technical users Go-live Business Sign-off
- 7. Migration to Simple Finance Install Simple Finance Add-on HANA DB ABAP 7.4 ECC 6 EHP 7 SAP Frontend BOBJ HTML5 Ariba Concur Fieldglass Hybris SuccessFactors Native integration for hybrid scenarios HANA Views Physical Tables Hot Warm Cold SAP HANA Platform SAP Business Suite Applications – Simple Finance SAP Fiori UX Mobile & Other Devices SAP Accounting Powered by HANA SAP Cash Management Powered by HANA SAP IBP for Finance
- 8. Post Migration Data Migration Customizing Installation Preparation S/4 Simple Finance Migration Process For customers already on SAP HANA DB, upgrading to SAP S/4HANA Simple Finance is done as below: • Perform process tests to ensure successful migration • Transfer data to cold database area • Update due date and offsetting account • Migration of financial data (GL/AP/AR/AA/CO/ML) • Reconciliation & Checks within and after migration • Customize General Ledger Accounting • Customize and activate New Asset Accounting • Customize Management Accounting (Account Based CO-PA) • Install simple finance add-on • System backs up index and total tables automatically • Create blueprint for process redesign & reporting • Perform reconciliation, period-end activities, gather reporting snapshots for before/after comparisons
- 9. Preparation • Perform Period end closing activities • Financial Reporting • Reconciliation for ensuring the data consistency • Pre Checks – Check Customizing Settings prior to upgrade to Simple Finance (SAP Note: 2129306) • Run Special Check Report (SAP Note: 1939592) • Closure of Posting Periods • Execute and Save Financial reports for comparison after migration
- 10. Installation • Installation is performed by the System Administrator • Following steps are executed automatically by the system ▫ Creation of Backup tables for Totals and Index tables (*_BCK in FI and *_BAK in CO) ▫ Save the Totals and Index tables in backup tables ▫ Delete the original totals and index tables ▫ Creation of SAP HANA views (with the same names) for the totals and index tables and new table ACDOCA for Universal Journal
- 11. Customization • General Ledger Customization • New Asset Accounting Customization • Controlling Customization Activate Business Functions • In this customizing activity you activate the business functions that are necessary for migrating to the SAP Simple Finance add-on for SAP Business Suite powered by SAP HANA. • You have to activate the following business functions in the customizing system and import them into the productive system: – FIN_GL_CI_1 – FIN_GL_CI_2 – FIN_GL_CI_3 • These business functions activate functionality in general ledger which is mandatory for the SAP Simple Finance Add-on.
- 12. Migration • Cost Element Master Data • Migration of Line Items • Migration of Balances • Reconciliation of Migrated Data • Finalization of Migration
- 13. Post Migration • Filling of Offsetting Account • Filling of Due Dates • House Bank Migration • Create Cold partitions for backup tables created during migration
- 14. Suggested Migration Sequence (1/3) Productive system uptime Downtime -Preparation -Installation -Import Customization -Migration -Completeness Check C o p y Import Development/Test System System Preparation Phase Installation of add-on Customization for migration Data migration Post Data Migration Data checks and process test Checks: Pre-checks Consistency & data clean up Custom Code Closing activities Reporting Installation: Installation of SAP Simple Finance Add- on Fiori HANA Live Customization: Customization of General Ledger Asset Accounting Controlling Data Migration: Cost Elements Enrich items/documents Line items Balances Post Migration: • Add further information to documents •Cold data store Data Check: Data comparison Reporting checks Process Test
- 15. Suggested Migration Sequence (2/3) 1. Start migration in separate copy of productive environment (DEV1) 2. Start migration in Development environment (DEV1) 3. Copy productive environment (PRD) to test environment (QA1) 4. Import customizing requests from development system (DEV1) 5. Migrate test environment (QA1), correct the errors found directly in test environment (QA1). 6. Repeat step 3, 4 and 5 test migration again to ensure error free migration 7. Migrate productive environment after successful test migration (QA1)
- 16. Suggested Migration Sequence (3/3) DEV QA PRD Existing landscape Transport Transport DEV1 1.Copy QA1 2. Migration to S4 Activities 3.Copy Import 4.Import Customizing Requests 5.Perform Migration and correct errors 6.Repeat 3,4 and 5 to ensure error free environment Import 7. Import the Customization to Production and complete rest migration steps in production
- 17. Duration of Migration Project Factors that can affect the duration are Support from customer Experience of project members and consultants Quality of Data Size of system Test migration is the best input for calculation of duration and potential challenges during the migration project
- 18. New Document Structure With SAP S/4HANA Finance, new universal data table ACDOCA has been installed. This table contains all of the line item documents from FI, FI-AA, and CO. All postings of these applications are written to the new table after the installation and migration are complete.
- 19. Safeguarding Current Investments The following tables were replaced by SAP HANA views with the same names: • The line item, totals tables and application index tables of General Ledger Accounting (GLT0, BSIS, BSAS and FAGLFLEXA, FAGLFLEXT, FAGLBSIS, FAGLBSAS) • The totals tables and application index tables of Accounts Receivable and Accounts Payable (KNC1, KNC3, LFC1, LFC3, BSID, BSIK, BSAD, BSAK) • The line item and totals tables of Controlling (COEP for certain value types, COSP and COSS) • The material ledger tables for parallel valuations (MLIT, MLPP, MLPPF, MLCR, MLCD, CKMI1, BSIM) • The Asset Accounting tables (ANEK, ANEP, ANEA, ANLP, ANLC) Replacing these tables with views with the same names ensures the continuation of all read accesses to the tables mentioned.