Migration from SAP WM to S/4HANA EWM

 

Introduction

 The EWM System of SAP aims to replace the SAP WM system and is considered to be the next generation Warehouse Management system.

Many companies are considering or have already started the migration from ERP WM to SCM EWM or SAP S/4HANA EWM.

Organizations requiring migration to EWM should first decide upon the form of migration.

In the migration scenarios section, we will review and comment on the possible different options.

Migration scenarios

The above table shows a scenario where companies decide to migrate their WM system from SAP ERP WM to WM in SAP S/4HANA. Companies that are interested in this migration must think about using a compatibility pack to adopt WM functionality in SAP S/4HANA. SAP has released Note 2269324 for that purpose.

Due to the large number of companies using WM, SAP has decided that the WM solution will remain available within the on-premise edition (by using SAP S/4HANA as a compatibility package solution).

Compatibility packs provide you with limited usage rights to run certain classic SAP solutions within SAP S/4HANA. However, they do require you to have acquired software usage rights for these solutions, as set forth in your license agreements.

Currently, the use of compatibility packs in SAP S/4HANA is set to expire on 31 December 2027. This includes Warehouse Management. According to SAP, this will give customers enough time to migrate from classic SAP solutions to the new solutions provided with SAP S/4HANA. If you have an existing integration with decentralised WM, you can continue to work on this integration even after migrating to SAP S/4HANA. However, new customers need to tread carefully here, as embedded EWM has been and will continue to be SAP’s focus area as its strategic warehousing solution in SAP S/4HANA.

Stock Room Management is a new option for installed base customers to continue running their classic Warehouse Management installations in the context of SAP S/4HANA beyond 2027.

Stock Room Management is an alternative or an option for companies using Warehouse Management today and not expecting an increase of complexity in their warehousing processes, or probably companies that might not be interested yet to move their warehouse management to a next level.

It is important to highlight the fact that functionalities like Task & Resource Management (LE-TRM), Value Added Service (LE-WM-VAS), Yard Management (LE-YM), Cross-Docking (LE-WM-CD), Wave Management (LE-WM-TFM-CP), Decentral Warehouse Management (LE-WM-DWM) and Warehouse Control Unit Interface (LSR) are not a part of Stock Room Management.

The above scenario is to migrate SAP ERP WM to embedded EWM in SAP S/4HANA.

To reduce the migration time and efforts, it is advised to use the SAP migration tools to migrate master data, warehouse layout, etc. 

Companies should be aware that this migration does not consist of a technical migration, they need to take it as a project due the big impact on the business processes and user trainings.

The above table describes a migration from decentralized EWM with SAP ERP to decentralized SAP EWM in SAP S/4HANA. For this migration scenario, you need to make sure that the decentralized SAP EWM has a version of SAP EWM 7.0 SP 13 or above. For more details, you can refer to SAP Notes 2241931 and 2376061.

In the above scenario, we show the migration of a decentralized SAP EWM with SAP ERP to embedded EWM in SAP S/4HANA. It is not currently possible to upgrade decentralized SAP EWM on SAP NetWeaver to embedded EWM in SAP S/4HANA directly.

The final scenario described above shows a migration from SAP EWM add-on in SAP ERP to embedded EWM in SAP S/4HANA. It is not currently possible to use a SAP EWM add-on for SAP S/4HANA, as it has not been released for on-premise SAP S/4HANA.

Migration tools: 

Organizations using WM must first think about adapting or translating the vocabulary used in WM to the new vocabulary in use in EWM.

It is crucial to understand what the different EWM objects refer to and to map them with the ones used in WM.

In order to help companies with their migration activities from their old WM to the new embedded EWM system, SAP has provided standard tools for migrating the organizational elements, strategies, customizing objects and master data from WM to embedded EWM.

Via the below IMG Path, you can find all the mapping tools available to help you perform your migration from WM to S/4HANA Embedded EWM.

Next to that, SAP has also provided tools for migrating master data.

The reports for such a migration can be accessed from SAP Easy Access path:

The usual process for data migration from each of these reports consists of multiple steps:

o  First, download data from the source WM warehouse in SAP ERP to a CSV file.

o  Once the data is downloaded from the source system in a CSV file, the data is checked for data consistency and validation by the business data team.

o  Finally, upload the CSV file to SAP S/4HANA via the upload function.

In order to not encounter issues when running the reports, ensure that the source warehouse in SAP S/4HANA is mapped to the target embedded EWM warehouse.

Source: https://www.linkedin.com/pulse/migration-from-sap-wm-s4hana-ewm-oussama-derraz/?utm_source=share&utm_medium=member_ios&utm_campaign=share_via