Procedure documentationChecking HU Numbering in ERP and EWM Locate this document in the navigation structure

 

You use this procedure to align the handling unit (HU) numbering in SAP ERP and SAP Extended Warehouse Management (EWM) and to activate if necessary the lean HU status update in ERP.

Note Note

This procedure is an optional step in the ERP-EWM integration.

End of the note.

HUs used in deliveries are communicated from EWM to ERP or the other way around. The HU number used in one application must not overlap with the free internal HU number range defined in the other application, as this would lead to queue errors.

If you implement the standard warehouse with preconfigured processes in EWM, the Implementation Tool for Warehouse Integration checks that the HU number ranges defined in EWM do not overlap with the free internal number range in ERP. In this case, you do not need to carry out this procedure.

The following table gives an overview of HU number ranges delivered in the standard system:

Application

Internal Ranges

External Ranges

ERP

1000000000-7999999999 (10 digits)

8000000000-9999999999 (10 digits)

EWM (warehouse W001)

800000000-899999999 (9 digits)

1000000-1999999 (7 digits)

None (all numbers outside the internal number ranges allowed)

In case you link several decentralized warehouses (EWM warehouses or LE-WM warehouses) to the same ERP system or in case you link several ERP systems to the same EWM system, you must check manually that the number ranges defined across all systems do not overlap, especially if you use stock transport orders for the transfer of goods between warehouses.

For this purpose, we review the basic rules for HU numbering and give an overview of the systems (ERP or EWM) in which HUs are created and of the ways the HUs are created (using internal or external numbers).

Basic Rules for HU Numbering in ERP-EWM Integration

  • ERP accepts all HU numbers from EWM except if they are within the free internal ERP number range. For example, in case of an internal ERP number range from 1000 to 7999 with a current number range status 1555, ERP accepts all numbers from EWM except in the interval of free numbers 1556-7999.

  • EWM accepts HU numbers from ERP if they are within the external EWM number range or within the assigned internal EWM number range (reusing existing HUs).

  • If no external number range is defined explicitly in EWM, all numbers outside the free internal number range belong to the external number range. This is an implicit external number range.

Recommendation Recommendation

It is technically not necessary to define an external number range in ERP for HU numbers communicated by EWM. In a multiple system landscape, however, we recommend defining external number ranges in ERP for documentation purposes.

End of the recommendation.

The following table lists the number range definitions based on where and how you create HUs:

New HU Created In

Number Range Definition

EWM (internal)

EWM: internal number range necessary

ERP: external number range not necessary. EWM number must be outside the free internal ERP number range

EWM (external)

EWM: implicit or explicit external number range necessary

ERP: external number range not necessary. EWM number must be outside the free internal ERP number range

ERP (internal)

ERP: internal number range necessary

EWM: implicit or explicit external number range necessary

ERP (external)

ERP: external number range necessary

EWM: implicit or explicit external number range necessary

Recommendation Recommendation

If you receive advanced shipping notifications (ASNs) from vendors and want to reuse the HU number from the vendors in the warehouse, we recommend using Serial Shipping Container Code (SSCC) instead of HU numbers from HU number ranges. The SSCC number ranges should not overlap with the HU number ranges.

End of the recommendation.

In addition to the definition of the HU number ranges, you can use this procedure to activate the lean HU status update and the non-unique HU numbering in ERP. This setting is necessary for stock transport order (STO) processes involving cross-delivery HUs. It is not relevant for the standard warehouse with preconfigured processes.

Procedure

If you implement the standard warehouse with preconfigured processes in EWM in a system landscape including one EWM-managed warehouse and one plant, no action is necessary.

If you implement your own warehouse or if you implement the standard warehouse in a more complex system landscape, carry out the following steps:

  1. Check the HU number ranges used in EWM:

    1. Note the internal number range numbers assigned to the packaging material types in Customizing for Extended Warehouse Management under   Cross-Process Settings   Handling Units   External Identification   Assign Number Range Intervals to Packaging Material Types  .

    2. Note the internal and external number ranges defined in your warehouse in Customizing for Extended Warehouse Management under   Cross-Process Settings   Handling Units   External Identification   Define Number Range for HU Identification  .

  2. Check the HU number ranges used in ERP:

    1. Note the internal and external number range numbers assigned to the packaging material types in Customizing for Logistics – General, under   Handling Unit Management   External Identification   Define Number Assignment for Each Packaging Material Type  .

    2. Note the internal and external number ranges defined in Customizing for Logistics – General, under   Handling Unit Management   External Identification   Number Range Maintenance for HU Identification  .

  3. Decide in which application (ERP or EWM) you create HUs and if you use an internal or an external number range for the HUs. Define the number ranges in EWM and ERP following the rules described above and transport if necessary the settings to other systems or clients.

  4. If you use STO processes with cross-delivery HUs, activate the lean HU status update in the ERP customizing system in Customizing for Logistics Execution under   Extended Warehouse Management Integration   Cross-Process Settings   Handling Unit Management   Set Lean HU Status Update in Non-unique HU Numbering Scenario  .

    For more information about this setting, see the Customizing documentation.