Migrating to SAP S4HANA ( etc.) (z-library.sk, 1lib.sk, z-lib.sk)

SAP PRESS is a joint initiative of SAP and Rheinwerk Publishing. The know-how offered by SAP specialists combined with the expertise of Rheinwerk Publishing offers the reader expert books in the field. SAP PRESS features first-hand information and expert advice, and provides useful skills for professional decision-making. SAP PRESS offers a variety of books on technical and business-related topics for the SAP user. For further information, please visit our website: http://www.sap-press.com. Mark Mergaerts, Bert Vanstechelman SAP S/4HANA System Conversion Guide 2020, 537 pages, hardcover and e-book www.sap-press.com/5035 Saueressig, Stein, Boeder, Kleis SAP S/4HANA Architecture (2nd Edition) 2023, 544 pages, hardcover and e-book www.sap-press.com/5675 Bardhan, Baumgartl, Choi, Dudgeon, Górecki, Lahiri, Meijerink, Worsley-Tonks SAP S/4HANA: An Introduction (4th Edition) 2021, 648 pages, hardcover and e-book www.sap-press.com/5232 Mark Mergaerts, Bert Vanstechelman SAP S/4HANA Administration 2024, 1113 pages, hardcover and e-book www.sap-press.com/5663 Saueressig, Gilg, Grigoleit, Shah, Podbicanin, Homann SAP S/4HANA Cloud: An Introduction (2nd Edition) 2022, 538 pages, hardcover and e-book www.sap-press.com/5457

Densborn, Finkbohner, Höft, Rubarth, Mathäß, Klöß Migrating to SAP S/4HANA® Operating Models, Migration Scenarios, Tools, and Implementation

Imprint This e-book is a publication many contributed to, specifically: Editor Rachel Gibson Acquisitions Editor Hareem Shafi German Edition Editor Simone Bechtold Translation Winema Language Services, Inc. Copyeditor Julie McNamee Cover Design Graham Geary Photo Credit iStockphoto: 481229372/© alex-mit Layout Design Vera Brauner Production E-Book Kyrsten Coleman Typesetting E-Book III-satz, Germany Printed and bound in the United States of America, on paper from sustainable sources We hope that you liked this e-book. Please share your feedback with us and read the Service Pages to find out how to contact us. Library of Congress Cataloging-in-Publication Data: Names: Densborn, Frank, author. | Finkbohner, Frank, 1969- author. Title: Migrating to SAP S/4HANA / by Frank Densborn, Frank Finkbohner, Martina Höft, Boris Rubarth, Kim Mathäss, and Petra Klöss. Description: 3rd edition. | Bonn ; Boston : Rheinwerk Publishing, 2024. | Includes index. Identifiers: LCCN 2023050523 | ISBN 9781493225194 (hardcover) | ISBN 9781493225200 (ebook) Subjects: LCSH: Systems migration. | SAP HANA (Electronic resource) Classification: LCC QA76.9.S9 D465 2024 | DDC 004.6--dc23/eng/20231114 LC record available at https://lccn.loc.gov/2023050523 LC record available at https://lccn.loc.gov/2020023822 LC ebook record available at https://lccn.loc.gov/2020023823 ISBN 978-1-4932-2519-4 (print) ISBN 978-1-4932-2520-0 (e-book) ISBN 978-1-4932-2521-7 (print and e-book) © 2024 by Rheinwerk Publishing, Inc., Boston (MA) 3rd edition 2024 4th German edition published 2023 by Rheinwerk Verlag, Bonn, Germany

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Contents Foreword .......................................................................................................................... 17 Introduction .................................................................................................................... 19 PART I SAP S/4HANA: The Basics 1 SAP S/4HANA: Requirements and Benefits 27 1.1 Future Business Challenges ...................................................................... 28 1.1.1 Digitization of Business Processes ............................................ 29 1.1.2 Trends of the Digital Transformation ...................................... 31 1.2 The Pledge of SAP S/4HANA ..................................................................... 37 1.2.1 Simplification of the Functionality ........................................... 37 1.2.2 Simplification of the Data Structure ........................................ 39 1.2.3 Simplified User Interfaces ........................................................... 40 1.2.4 Simplification of Analyses ........................................................... 41 1.3 Summary ........................................................................................................... 42 2 SAP S/4HANA versus the Traditional SAP Business Suite 43 2.1 Comparing the Available Solutions: SAP S/4HANA and the Digital Core ............................................................................................... 43 2.2 Simplification .................................................................................................. 45 2.3 New Data Model and the SAP HANA Database ............................... 47 2.3.1 SAP HANA .......................................................................................... 48 2.3.2 The Data Model ............................................................................... 49 2.3.3 Handling Existing Data ................................................................. 51 2.3.4 Sizing .................................................................................................. 52 2.4 SAP Fiori User Interfaces ............................................................................. 53 2.4.1 Technological Changes ................................................................. 54 2.4.2 Operating Concept ......................................................................... 55 2.5 Interfaces ........................................................................................................... 59 2.6 SAP S/4HANA Embedded Analytics ....................................................... 60 2.7 Summary ........................................................................................................... 617

Contents3 Cloud, On-Premise, and Hybrid Scenarios 63 3.1 Overview of Operating Models ............................................................... 64 3.1.1 On-Premise Operating Model ..................................................... 64 3.1.2 Cloud Operating Model ................................................................ 64 3.1.3 Hybrid Operating Model ............................................................... 67 3.2 The SAP S/4HANA Product Family .......................................................... 68 3.2.1 SAP S/4HANA ................................................................................... 68 3.2.2 SAP S/4HANA Cloud, Public Edition .......................................... 71 3.2.3 SAP S/4HANA Cloud, Private Edition ........................................ 74 3.3 Comparing the Operating Models .......................................................... 75 3.3.1 Hardware, Software, Operation, and Maintenance ............ 75 3.3.2 User Interfaces ................................................................................. 76 3.3.3 Functional Scope and Supported Country Versions ............ 77 3.3.4 Options for Enhancement ............................................................ 78 3.3.5 Payment Model and Runtime ..................................................... 79 3.3.6 Model for Migration to SAP S/4HANA ..................................... 79 3.4 RISE with SAP ................................................................................................... 80 3.5 SAP Business Technology Platform ........................................................ 82 3.5.1 Overview ............................................................................................ 82 3.5.2 Tools .................................................................................................... 83 3.5.3 ABAP Cloud ........................................................................................ 88 3.5.4 Migration of Custom ABAP Code to ABAP Cloud ................. 91 3.5.5 Business Functionalities of SAP Business Technology Platform ...................................................................... 95 3.6 Extensibility of SAP S/4HANA .................................................................. 98 3.6.1 Side-By-Side Enhancements ........................................................ 100 3.6.2 In-App Enhancements ................................................................... 102 3.6.3 Checking Custom Enhancements When Migrating to SAP S/4HANA .............................................................................. 107 3.7 Summary ............................................................................................................ 108 PART II Preparing for Migration to SAP S/4HANA 4 Which Migration Options Are Available? 111 4.1 Basic Considerations ..................................................................................... 111 4.2 The Three Migration Scenarios ................................................................ 1168

Contents4.2.1 New Implementation of SAP S/4HANA .................................. 117 4.2.2 System Conversion to SAP S/4HANA ....................................... 121 4.2.3 Selective Data Transition to SAP S/4HANA ........................... 129 4.3 Summary ........................................................................................................... 131 5 Selecting Your Migration Scenario 133 5.1 Overview of Procedures and Input Helps ........................................... 133 5.1.1 SAP Innovation and Optimization Pathfinder ...................... 134 5.1.2 SAP Transformation Navigator .................................................. 136 5.1.3 SAP Readiness Check ..................................................................... 138 5.2 Creating Your Own Roadmap .................................................................. 140 5.2.1 Initial Situation: Single System .................................................. 144 5.2.2 Initial Situation: Decentralized System Landscape ............. 148 5.2.3 Sample Roadmaps .......................................................................... 151 5.3 The Most Important Criteria for Your Decision ................................ 155 5.4 Summary ........................................................................................................... 158 6 Trial Systems and Content to Try Out 159 6.1 The SAP S/4HANA Trial System ............................................................... 160 6.2 SAP S/4HANA Fully-Activated Appliance ........................................... 162 6.3 Solution Scope of SAP S/4HANA Fully-Activated Appliance ...... 165 6.4 SAP Discovery Center and SAP AppHaus ............................................. 168 6.4.1 SAP Discovery Center .................................................................... 168 6.4.2 SAP AppHaus .................................................................................... 174 6.5 Summary ........................................................................................................... 179 PART III Migration through System Conversion Using the Brownfield Approach 7 Preparing System Conversion 183 7.1 Overview of the System Conversion Project ..................................... 1839

Contents7.1.1 System Conversion Process ......................................................... 185 7.1.2 System Group Conversion ............................................................ 187 7.2 System Requirements and Checks ......................................................... 191 7.2.1 General Considerations ................................................................ 191 7.2.2 System Requirements ................................................................... 194 7.2.3 Simplification List ........................................................................... 195 7.2.4 Maintenance Planner .................................................................... 198 7.2.5 Simplification Item Checks .......................................................... 203 7.2.6 Analyzing Custom Developments ............................................. 207 7.2.7 Database Sizing for SAP S/4HANA ............................................ 220 7.2.8 Software Update Manager with Prerequisite Check Extended ............................................................................................ 220 7.2.9 SAP Readiness Check for SAP S/4HANA .................................. 222 7.3 Summary ............................................................................................................ 224 8 Executing System Conversion 225 8.1 Using Software Update Manager ........................................................... 225 8.2 Activities after SUM ...................................................................................... 230 8.2.1 Converting Accounting ................................................................. 230 8.2.2 Monitoring Silent Data Migration ............................................. 233 8.2.3 Adapting Custom Developments .............................................. 234 8.2.4 Setting Up the SAP Fiori Frontend Server ............................... 236 8.2.5 Migrating to SAP Fiori User Interfaces ..................................... 239 8.2.6 Deleting Obsolete Data ................................................................ 241 8.3 Estimating and Reducing the Downtime ............................................ 242 8.3.1 Tuning of the Standard Conversion .......................................... 245 8.3.2 Uptime Migration (Downtime-Optimized DMO) ................ 246 8.3.3 Downtime-Optimized Conversion ............................................ 248 8.3.4 Near-Zero Downtime Technology ............................................. 249 8.4 Conversion Target Hyperscaler ................................................................ 250 8.4.1 Move to Hyperscaler with the Database Migration Option ................................................................................................. 251 8.4.2 Conversion to SAP S/4HANA Cloud, Private Edition ............ 254 8.5 Insights from Previous Customer Projects .......................................... 254 8.6 Summary ............................................................................................................ 25610

ContentsPART IV New Implementations and Data Migration Using the Greenfield Approach 9 SAP Activate 259 9.1 SAP Activate Content ................................................................................... 260 9.1.1 SAP Best Practices ........................................................................... 261 9.1.2 SAP Activate Methodology .......................................................... 264 9.1.3 Tools .................................................................................................... 267 9.2 SAP Activate Phases ..................................................................................... 271 9.3 Summary ........................................................................................................... 274 10 Installing On-Premise SAP S/4HANA or SAP S/4HANA Cloud, Private Edition 275 10.1 Installation ....................................................................................................... 276 10.2 Deploying Production Systems with SAP Cloud Appliance Library ................................................................................................................. 283 10.3 Summary ........................................................................................................... 286 11 Setup and Configuration of SAP S/4HANA Cloud 289 11.1 Objective and Overview ............................................................................. 289 11.2 System Landscape ......................................................................................... 291 11.2.1 Overview of the Three-System Landscape ............................. 291 11.2.2 Provisioning of the Systems ........................................................ 293 11.2.3 Creating Roles, Authorizations, and Initial Users ................ 293 11.2.4 Defining the Deployment Targets ............................................ 295 11.3 Defining the Solution Scope ..................................................................... 296 11.3.1 Project Management in SAP Central Business Configuration .................................................................................. 296 11.3.2 Determining the Customer Processes to Be Set Up ............ 298 11.3.3 Defining the Organizational Structure ................................... 30211

Contents11.4 Configuration Management ..................................................................... 306 11.4.1 Configuration Management in SAP Central Business Configuration ................................................................................... 308 11.4.2 Configurations in SAP /4HANA Cloud ...................................... 310 11.5 SAP Central Business Configuration with SAP Activate and SAP Cloud ALM ................................................................................................ 311 11.5.1 SAP Central Business Configuration and SAP Activate ...... 311 11.5.2 SAP Central Business Configuration with SAP Cloud ALM ................................................................................. 313 11.6 Summary ............................................................................................................ 313 12 Planning Data Migration 315 12.1 Data Migration Using SAP Activate ....................................................... 316 12.1.1 Data Migration in SAP Activate Roadmaps ............................ 316 12.1.2 Roadmap: SAP Activate for SAP S/4HANA Cloud, Public Edition .................................................................................... 317 12.1.3 Roadmap: SAP Activate Methodology for Business Suite and On-Premises – Agile and Waterfall ....................... 320 12.2 Data Migration Phases ................................................................................ 322 12.2.1 Data Analysis .................................................................................... 324 12.2.2 Data Cleansing ................................................................................. 327 12.2.3 Mapping ............................................................................................. 328 12.2.4 Implementation .............................................................................. 329 12.2.5 Testing ................................................................................................ 331 12.2.6 Data Validation ................................................................................ 334 12.2.7 Productive Load and Support ...................................................... 336 12.3 Project Planning Using SEAMAP .............................................................. 338 12.3.1 Overview of General Work Packages for SAP S/4HANA Systems .................................................................. 338 12.3.2 Work Packages for SAP S/4HANA Cloud–Based Systems .............................................................................................. 346 12.4 Tools for Data Migration Planning ......................................................... 346 12.4.1 Estimating the Effort Using Microsoft Excel ......................... 347 12.5 Summary ............................................................................................................ 35212

Contents13 SAP S/4HANA Migration Cockpit 355 13.1 Data Migration Using the SAP S/4HANA Migration Cockpit ..... 355 13.1.1 Overview of the SAP S/4HANA Migration Cockpit Migration Approaches .................................................. 356 13.1.2 Available Migration Objects ....................................................... 358 13.1.3 Additional Useful Sources of Information ............................. 361 13.2 Transfer Option 1: Migrate Data Using Staging Tables ............... 361 13.2.1 Technical Realization .................................................................... 361 13.2.2 Assigning Roles for the Migration ............................................ 365 13.2.3 Initial Screen of the Migration Cockpit ................................... 366 13.2.4 Data Migration Process ................................................................ 367 13.2.5 Creating a Migration Project ...................................................... 368 13.2.6 Editing a Migration Project ......................................................... 373 13.2.7 Filtering the Project Overview .................................................... 377 13.2.8 Calling the Migration Project ..................................................... 379 13.2.9 Monitoring the Activities ............................................................. 386 13.2.10 Downloading Migration Templates ......................................... 389 13.2.11 Filling Migration Templates or Staging Tables Directly .... 396 13.2.12 Loading a File to Staging Tables ................................................ 401 13.2.13 Using Migration Object Instances ............................................ 413 13.2.14 Prepare ............................................................................................... 416 13.2.15 Maintenance of Mapping Values .............................................. 417 13.2.16 Job Management ............................................................................ 425 13.2.17 Simulating the Migration ............................................................ 427 13.2.18 Migrating Data ................................................................................ 430 13.2.19 Message on Situation Handling ................................................ 432 13.2.20 Migration Results ........................................................................... 433 13.2.21 Creating a Correction File ............................................................ 435 13.2.22 Mass Processing via Free Selection on Instances ................ 437 13.2.23 Messages ........................................................................................... 440 13.2.24 Finishing a Project .......................................................................... 444 13.2.25 Checking an Object for Updates and Updating ................... 446 13.3 Transfer Option 2: Migrate Data Directly from SAP System (Direct Transfer) ............................................................................................. 448 13.3.1 Differentiation and Areas of Use .............................................. 449 13.3.2 Technical Requirements and System Preparations ............ 450 13.3.3 Migration Objects for SAP ERP Systems and Other SAP Source Systems ....................................................................... 452 13.3.4 Assigning Roles for the Migration ............................................ 453 13.3.5 Running a Project with Direct Data Transfer ........................ 45413

Contents13.4 Performance Considerations .................................................................... 473 13.4.1 Transfer Process .............................................................................. 473 13.4.2 Transfer Method and Infrastructure ........................................ 473 13.4.3 System Parameters and Configuration ................................... 474 13.4.4 Direct Transfer: Specific Considerations ................................. 475 13.5 Complementing Applications ................................................................... 475 13.5.1 Setting the Migration Key Date for Financial Objects ........ 476 13.5.2 Checking the Status of Data Migration ................................... 481 13.6 Summary ............................................................................................................ 498 14 SAP S/4HANA Migration Object Modeler 499 14.1 General Structure of the SAP S/4HANA Migration Object Modeler .............................................................................................................. 500 14.1.1 Selecting an Existing Migration Object ................................... 502 14.1.2 Advanced Search (All Objects) .................................................... 503 14.2 Modeling for Data Migration Using Staging Tables ....................... 504 14.2.1 Migration Application Programming Interfaces Used ....... 505 14.2.2 Displaying a Migration Object .................................................... 505 14.2.3 Creating a Migration Object ........................................................ 509 14.2.4 Extending Existing Migration Objects ..................................... 514 14.2.5 Creating Custom Migration Objects ........................................ 524 14.2.6 Creating Custom Rules and Translation Objects ................. 537 14.2.7 Simulating or Debugging Migration Objects ........................ 541 14.2.8 Transferring Migration Projects from One System to Another ............................................................................................... 542 14.3 Modeling for Data Migration Using Staging Tables in SAP S/4HANA Cloud, Public Edition ...................................................... 544 14.4 Modeling for Directly Transferring Data from SAP Systems ...... 545 14.4.1 Basic Knowledge for Modeling ................................................... 545 14.4.2 Creating a Migration Object ........................................................ 549 14.4.3 Synchronizing Structures ............................................................. 551 14.4.4 Deleting a Migration Object ........................................................ 552 14.4.5 Creating User-Defined Rules ....................................................... 552 14.4.6 Changing the Standard Selection .............................................. 554 14.4.7 Migrating Table Field Extensions (Z Fields) ............................ 556 14.4.8 Simulating and Debugging Migration Objects ..................... 557 14.4.9 Monitoring ........................................................................................ 558 14.4.10 System Tasks .................................................................................... 55814

Contents14.4.11 Updating Migration Objects ....................................................... 559 14.4.12 Transporting Projects .................................................................... 559 14.5 Additional Useful Sources of Information .......................................... 560 14.5.1 Landing Pages of Data Migration ............................................. 560 14.5.2 SAP Community .............................................................................. 561 14.5.3 Performance Considerations ...................................................... 561 14.5.4 Aligning the Time of Migration with Maintenance Periods ................................................................................................ 561 14.6 Summary ........................................................................................................... 562 15 Rapid Data Migration 563 15.1 Tools .................................................................................................................... 563 15.2 Architecture ..................................................................................................... 565 15.3 Migration Content ........................................................................................ 568 15.3.1 Interfaces as Part of the Migration Content ......................... 570 15.3.2 Example: Migrating Bank Master Data ................................... 571 15.4 Connecting to Source Systems ................................................................ 575 15.5 Data Profiling .................................................................................................. 578 15.6 Field Mapping ................................................................................................. 581 15.7 Value Mapping and Conversion Tables ............................................... 587 15.8 Data Validation .............................................................................................. 594 15.9 Importing Data ............................................................................................... 597 15.10 Monitoring ........................................................................................................ 599 15.11 IDoc Performance Optimization ............................................................. 601 15.12 Summary ........................................................................................................... 604 16 Comparing Data Migration and Modeling Tools 605 16.1 Comparing Data Migration Tools ........................................................... 605 16.1.1 Costs ................................................................................................... 606 16.1.2 Availability of Migration Tools ................................................... 607 16.1.3 Coverage of Migration Objects .................................................. 60815

Contents16.1.4 Technical Characteristics .............................................................. 609 16.1.5 Performance ..................................................................................... 610 16.1.6 Volume and Customer Segment ............................................... 611 16.2 Comparing Modeling Tools ....................................................................... 612 16.3 Advantages and Disadvantages of Data Migration Tools ........... 614 16.4 Conclusion ......................................................................................................... 615 The Authors ...................................................................................................................... 617 Index ................................................................................................................................... 621 Service Pages  ........................................................................................................... I Legal Notes  ............................................................................................................... I16

Foreword The global economy is changing, and companies need to keep pace with digital transformation to remain competitive. In this context, the migra- tion to SAP S/4HANA represents an important step toward providing com- panies with a modern, flexible, and future-oriented ERP suite that can optimize their business processes. Especially today, when the working world has changed a lot due to the Covid pandemic, the topic of cloud and remote working is becoming more and more important. SAP S/4HANA Cloud provides companies with an important option to work agilely and efficiently and to react faster to changes in the market. This book provides a comprehensive guide for companies considering the transition to SAP S/4HANA. It presents various operating models and tran- sition scenarios and explains how companies can make the transition most efficiently and achieve maximum competitive advantage. Individual requirements are taken into account to help companies select the most suitable options for them. SAP S/4HANA has been licensed by more than 21,800 customers and is now used by more than 16,550 customers worldwide. More and more companies are recog- nizing the benefits of migrating to SAP S/4HANA. This book is designed to help companies successfully navigate the transition to SAP S/4HANA and protect their investment in the current system landscape to optimize their business pro- cesses. We wish you every success in your migration to SAP S/4HANA and hope that this book will serve as a valuable guide for you. Jan Gilg President and Chief Product Officer, Cloud ERP Walldorf, May 202317

© 2024 by Rheinwerk Publishing Inc., Boston (MA)

Introduction Regardless of your situation, if you want to migrate to SAP S/4HANA, this book is the guide you need. We’ll familiarize you with all the critical areas of the new SAP S/4HANA system and describe how to migrate to SAP S/4HANA using individual migration scenarios to illustrate the process. On-premise or in the cloud? In this context, along with introducing the basic options for the tools pro- vided by SAP, we’ll also support you during the migration process by illus- trating typical usage scenarios. Our goal is to provide optimal support and find the best way to make SAP S/4HANA work for you—irrespective of whether you want to use SAP S/4HANA in the cloud or on-premise and irre- spective of your existing enterprise resource planning (ERP) system. This book describes different operating models for SAP S/4HANA and explains the differences in the migration processes of the various models. ScenariosYou’ll also learn how to convert your existing SAP system to SAP S/4HANA, how to implement a new SAP S/4HANA system and transfer your data to this system, and how to transform an existing landscape into an SAP S/4HANA landscape. SAP has defined three paths to using SAP S/4HANA:  New implementation of SAP S/4HANA  System conversion to SAP S/4HANA  Selective data transition to SAP S/4HANA The goal of this book is to illustrate and explain the necessary processes in detail. After introducing the basic principles of SAP S/4HANA, we’ll discuss all aspects of the migration scenarios and of the migration for SAP S/4HANA and SAP S/4HANA Cloud. You’ll get step-by-step descriptions of the different migration scenarios, along with comparisons of their differing require- ments and implementations using real-life examples. This book will also equip you with decision-making criteria and the necessary knowledge to perform the migration. By the end, you’ll be the person with the know-how to decide which method is ideal for your migration to SAP S/4HANA. Who This Book Is For Because this book provides a holistic overview of migrating to SAP S/4HANA, we’ve targeted various groups of readers. For making decisions and choosing the appropriate migration scenario, this book supports IT managers and administrators who will integrate SAP S/4HANA. However, because we also go into detail, this book also supports SAP consultants who manage SAP19

IntroductionS/4HANA migration projects for customers or in their own organization, as well as project leads who want to get an overview of the individual methods and tools. All of these groups can use the instructions in this book as a guide to implementing their own migration projects. Previous knowledge Because SAP S/4HANA is a separate business suite, you don’t need any pre- vious SAP ERP knowledge for this book. However, if you want to reproduce the migration scenarios in this book, you should have a basic understand- ing of SAP NetWeaver. For more information on SAP NetWeaver, SAP HANA, and data migration in SAP systems, or for a detailed business over- view of SAP S/4HANA, refer to the other specialized SAP PRESS books. Release status This book describes all procedures and methods for SAP S/4HANA 2022 and SAP S/4HANA Cloud 2302, the latest releases as this book was going to press. If you use higher versions, the screenshots shown in this book might devi- ate slightly from your screen views. However, we assume that the basic steps for migrating to SAP S/4HANA will stay the same in higher releases. Terminology The term SAP S/4HANA migration in this book is the generic term for the various scenarios of the migration to SAP S/4HANA. This term not only refers to data migration and data transfer from legacy IT systems or SAP production systems but also to the conversion of individual systems or the transformation of system landscapes. Structure of This Book This book is structured into four parts. The following summarizes the con- tent of these parts and the individual chapters to help you navigate the book. Part I: SAP S/4HANA: The Basics The first part of the book contains descriptions of the most important basic concepts necessary for you to make a decision for or against a specific installation and migration scenario. This part is also relevant to IT manag- ers and IT employees in organizations that haven’t yet decided on a con- crete migration plan but want to get more information about the various options. We’ll explain the various deployment options for SAP S/4HANA, that is, in a public cloud, in a private cloud, on-premise, and as a hybrid model. Finally, you’ll learn how to prepare the migration to SAP S/4HANA and explore the steps of a new implementation method for SAP S/4HANA.20 © 2024 by Rheinwerk Publishing Inc., Boston (MA)