Symptom
You would like to create the Warehouse Task with a different Alternative Unit of measure.
Environment
- SAP Extended Warehouse Management (SCM-EWM)
- SAP Extended Warehouse Management Warehouse Order Processing (SCM-EWM-WOP)
- SAP Extended Warehouse Management Warehouse Monitor (SCM-EWM-MON)
Cause
The system takes the AUoM of the available quantity when creating a WT. It also tries to determine which AUoM is best suited for WT execution. If a quantity equivalent to a whole pallet is to be removed, then system creates a WT with the AUoM for a pallet. EWM decides whether to use another AUoM for the WT according to the quantity for the WT or to the quantity classification that is maintained in the WT's source storage type and in the product master. If the product has a packaging specification, system uses the AUoM from the packaging level which fits the WT. If there is no packaging specification, EWM attempts to determine an AUoM by checking the product master for the AUoM's conversion factors.
Resolution
This is the standard behavior. The Alternative Unit of Measure is determined in the BAdI /scwm/ex_core_rms_hu_quan in this process. Currently, the standard implementation of this BAdI is executed in class /SCWM/CL_EI_CORE_RMS_HU_QUAN. This standard implementation always sets the Alternative Unit of Measure to the BUoM, if no bigger AUoM is found.
For example, in master data it is set that 1 EA = 1 PC, and the BUoM is PC, then system will always define AUoM as PC since this is also the BUoM.
If product master data is set as 10 PC = 1 PAL, and the request is 10 PC quantity, system will determine AUoM as 1 PAL, since this is the bigger UoM.
Before SUoM (Stock-specific Unit of Measure), EWM could only determine the UoM by Packaging Specification. There needs to be a condition record of type 0WHT pointing towards the packaging specification for this product / Supply Chain Unit. There must be a level in the packaging specification which has as Warehouse Attributes the Quantity Classification of the storage type (in your case: 3). If found, EWM should take over the UoM from the Packspec level into the WT.
From EWM 9.0 on, you can use SUoM functionality. For more information, please check the online documentation here.
Preffered Unit of Measure case
The defined 'preferred Unit of Measure' does not influence the AUoM of the Warehouse Task. This preferred UoM is only seen as a planning value in EWM, but for the actual Warehouse Task creation this is not considered. The AUoM of the Warehouse Task is always based on the existing source stock situation. The WT creation will try to propose a suitable Alternative Unit of Measure that could be better suited for picking, to make the picking easier for the worker.
See Also
1872450 - SUOM not transferred to warehouse task and stock
1991661 - Operative unit of measure not determined using quantity classification
2370063 - Incorrect alternative unit of measure proposed for pick warehouse task