You can use Handling Unit Management (HUM) to reflect packing-based logistics structures in the SAP System. Using this method, you track the movements of entire handling units and the materials they contain rather than tracking each material individually.
Activate Storage Unit Management for all storage types in which you want to putaway handling units and that have putaway strategies. Leave Storage Unit Management deactivated for all other storage types, especially for interim storage areas.
You can define for each warehouse number whether several users can pick the same material from the same storage bin at the same time, and if so, to what extent. If you use Handling Unit Management, it is necessary to use blocking logic B (Block material (shared) for maximum level of parallel proc.).
Handling unit
Handling units can be used in all processes within the supply chain.
A handling unit is a physical unit that consists of the packaging materials (load carrier / packaging material) and the goods contained therein. A handling unit is always a combination of materials and packaging materials . All the information contained in the material items, such as batches and serial numbers, is always available by way of the handling units.
Handling units can be nested, meaning that you can also create new handling units from several handling units as often as you like.
Handling units have unique, scannable identification numbers that can be formed according to standards such as EAN 128 or SSCC.
The handling unit object contains the following attributes:
- Identification number
- Dimensions
- Weight
- Volume
- Status
- Materials and quantities
- Packaging materials
- Packing instructions
A handling unit consists of a handling unit header and handling unit items. For identification purposes, it is given a unique number.
Status
The handling unit is linked to general status management. In this way, the various physical states (planned or implemented) and other attributes (weighed, loaded, blocked or posted goods issue) of handling units can be documented.
You can use the HU_ST_INIT user parameter when you create handling units without object reference to set which initial status the handling unit is to have when it is created.
If you want to implement a status of your own, you can define a user-specific procedure for the packaging material type (see also Define Packaging Material Types ).
SAP HU Customizing
The settings for handling unit are relatively simple and just take few steps, the demand for further use in HU like combination with warehouse , picking-HU, HU determination or also aggregated functionalities increase the complexity level accordingly. Basically the necessary conditions is to set a packaging material type and a material group for packing and have it assigned to material of the packing type. Some further minor setting and any packable material can be packed in it, detailed information is available in creating a packing material wiki page.
HU Structure
The VEKP table (Handling Unit - Header Table) is the one which contain the identification and main overall information of the HU, the details is found in the item level, there are in the table besides the ones shown in the picture below the fields related to status, which document the HU is assigned and document number which HU is assigned, those fields are very important to determine the current status of the HU.
The VEPO table (Packing: Handling Unit Item (Contents)) is the one which contain the that has either material or pack information (in case of a nested HU exists), it is the item level. All the HU must be comprised of Header + Item levels.
HU Main Operations
A handling unit can be monitored through the HUMO transaction which presents all the handing unit information like status, document referenced, movement history as well as HU further levels
content. The VLMOVE transaction is then used for the movements possible for any handling unit and the packing/unpacking can be done through the delivery transactions (inbound/outbound). A handling is mostly created through HU02 transaction.
*Transactions for creating and changing handling units: *
Create/Change/Repack Handling Units (General) (HU02);
Packing Station in Warehouse (HUPAST);
Pack Production Orders (COPAWA/COWBPACK);
Using the Handling Unit Monitor (HUMO);
*Display functions for handling units: *
Directly using the Handling Unit Monitor (HUMO);
Indirectly using the stock overviews for the material (MMBE and LS26);
For the individual document types: Inbound and outbound delivery, transfers, material documents, and so on (HUIBD, HUOBD, HUTRA and so on);
Handling units are not included in document archiving for the delivery or the transport. However, there is a report that archives handling units;
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