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prakashpol1
Explorer
This blog post will help readers to understand the key differences between Stock Room Management (StRM) and Extended Warehouse Management (EWM).

Differences between Stock Room Management and EWM-Basic, EWM-Embedded Advanced and EWM on Decentralized on S/4 HANA are compared and listed here for developing better understanding amongst WMS selection decision makers.

In my previous blog, "Should I migrate LE-WM to Stock Room Management?" I have captured the functional differences between Stock Room Management and LE-WM. This is a second blog in the same series to throw more light on its functional comparison with EWM.

Also refer my latest blog which provides deep insight into the options to be considered when the legacy LE-WM is found to be not compliant for stock room management (What Options to Consider if Legacy LE-WM is Not Compliant for Stock Room Management during S/4HANA M...).

I have summarized the functional and key product differences in the below table based on various features and comparison parameters.















































































































































































Features/Comparison parameters Stock Room Management (with HUM) Basic Embedded EWM on S/4 HANA Advanced EWM Embedded on S/4 HANA EWM Decentralized on S/4 HANA
Architecture Part of S/4HANA ERP Part of S/4HANA ERP Part of S/4HANA ERP Separate Application on S/4HANA
SAP Future Innovations Not supported Improvements limited to Basic features will be added in future S/4HANA versions Future Innovations for the warehouse capabilities will be delivered by SAP only for EWM component of S/4 HANA.
License Included in the SAP S/4HANA Enterprise Management license. Advanced EWM will require the Classic SAP EWM Component License
Futuristic Warehouse Modernization Outlook Very low Low High Very High
Barcode Scanning/Mobile Execution Yes Yes Yes Yes
Bin to Bin transfer Yes Yes Yes Yes
Basic Inbound Yes Yes Yes Yes
Basic Outbound Yes Yes Yes Yes
Physical Inventory Yes Yes Yes Yes
Complex Processes like process oriented or layout-oriented storage control No Yes Yes Yes
Internal Warehouse Movements Yes Yes Yes Yes
Wave Management No No Yes Yes
Cross-docking No No Yes Yes
Serial Numbers Yes through HUM Yes Yes Yes
SSCC Numbering of HUs Yes Yes Yes Yes
MFS Support No No Yes, with restrictions Yes
WM-PP Interface (Production Integration) Basic Integration

1. Delivery-based Integration

2. Advanced Production Integration

3. Direct Production Integration

4. MES-Driven Staging


1. Delivery-based Integration

2. Advanced Production Integration

3. Direct Production Integration

4. MES-Driven Staging


1. Delivery Based Integration

2. Advanced Production Integration

3. MES-Driven Staging


WM-QM Integration

(Quality Management Integration)
Basic

All major QM integration scenarios covered.

Basic EWM is integrated into Quality Management (QM) using inspection lots of origin 17.
All major QM integration scenarios covered. All major QM integration scenarios covered.
Physical Inventory Yes Yes Yes Yes
Integration with S/4H Core Very tight ERP integration Tight ERP integration Tight ERP integration Robust ERP-Interfacing mechanism
WM-SAP TM Integration No Yes Yes Yes
Technical Migration Complexity from Old SAP WM Low Medium Medium Medium to High
Complexity of warehouse supported Low complexity Medium Medium to High complex High to very high complex
Recommended for

Small size warehouses with manual operations without any advanced requirements and having pre-defined set of lean processes e.g.:

- Quick adoption of legacy Classical SAP WM managed manual warehouses without any process changes

- Small warehouses e.g. Affiliates managed small warehouses, MRO warehouse or stores with bin to bin transfer need


Small to medium size warehouses requiring full stock transparency and control

-  Small Raw Material warehouses

-  Medium size, own operated distribution centers with less complexity of operations


For medium to  large warehouse requiring advanced & optimized warehousing features, typically for

- the medium complex distribution centers managed by own WMS with very limited MFS/ASRS

- Integration with small to medium production sites with less complex manufacturing Integration need in which  the decoupling of WMS from production is not the core requirement.


For all medium to very large complex warehouses with optimized warehousing features.

Best suited for the heavily automated warehouses for business models consisting of decoupling of WMS from MFG IT landscape-

- Production warehouses connected to local MES systems,

- SCM hubs

- Advanced and very large warehouses looking to implement Next-Gen technologies for warehouse automation (like IOT, Smart robots etc.)

 

Conclusion


With all evaluating parameters mentioned in above comparison table, it is worthwhile to reiterate in this blog too that one should carefully evaluate all the warehouse key business parameters and requirements along with the long term business plan and based on this detailed evaluation business can take conscious decision on choosing specific WM solution (StRM vesrus EWM)in order to get best ROI from the IT investment of migrating to new age S/4 HANA release.

 

References



  1. Should I migrate from LE-WM to Stock Room Management? by Prakash Pol

  2. 2881166 – FAQ : Stock Room Management

  3. Chapter 2.12.3.2.1 Stock Room Management of the Feature Scope Description of SAP S/4HANA 2020 (You can find the link to the Feature Scope Description of SAP S/4HANA 2020 in the Product Documentation section)

  4. Note 2577428 – Road map for LE-WM in SAP S/4HANA

  5. 2270211-  – S4TWL – Warehouse Management (WM)

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