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Weight changes over time for certain products like Meat, Poultry , Fish , Dairy etc and hence the products are required to be monitored in parallel units for its inventory. SAP provides a functionality known as ‘Catch weight management’ which provides the option to capture the parallel units as shown in below image (copied from a SAP document prior to the release of S/4HANA) .


SAP recommends to use  'Base Unit' as countable like Piece / Carton / Case and 'Parallel Unit' as measurable like Kg / Gallon as shown in above image.

Presently working for a Dairy customer migrating SAP Extended warehouse management (EWM) on SCM to EWM on S/4HANA. Faced some issues with catch weight (CW) materials and found some changes for catch weight management in S/4HANA w.r.t SAP ECC. My present blog is to describe the changes with CW management in ERP S/4HANA & EWM on S/4HANA and its pre-requisite system set up. Refer my earlier blogs like https://blogs.sap.com/2020/01/12/decentralized-ewm-on-s-4hana-deployment-transfer-of-master-data-tra... and https://blogs.sap.com/2019/05/06/decentral-extended-warehouse-management-ewm-on-s4hana-features-depl... for generic migration details for decentral EWM on S/4HANA.

SAP S/4HANA does NOT support the category of the unit of measure for a material with value 'B' (Parallel Unit of Measure (BUoM is Valuation Unit of Measure) as stated in SAP notes like 2358928, 2668177. CW materials can now be set with Base UoM as CAR (or PC or EA) with Kg as Parallel unit of measure and valuation unit of measure as shown in below image.


Decentral EWM on S/4HANA gets the 'Logistic UoM' as CAR i.e the same as set for Base UoM in ERP material master with S/4HANA as depicted in above image.

Valuation quantity also appears as editable with UoM as Kg as in below image while creating a handling unit for an inbound delivery in decentral EWM on S/4HANA.

And the 'Value measured' gets changed to A (Valuation quantity as measured) when the valuation quantity is entered as 10.5 Kg as shown in below image.

Note that the activation of business function /CWM/CM_1 is a Pre-requisite for Catch weight management to work with S/4HANA as stated in the attachment with SAP note 2671323. The 'Logistic UoM' in EWM product master was appearing as Kg prior to the activation of business function /CWM/CM_1 in decentral EWM on S/4HANA.The above screenshots are from a decentral EWM on S/4HANA 2020 release. The same set up is also required for embedded EWM on S/4HANA. This business function /CWM/CM_1 needs to be activated in decentral EWM on S/4HANA as well as in ERP if the ERP is on S/4HANA.

This blog is based on my personal tests, observations, insights in ERP S/4HANA 2021 release and Decentral EWM on S/4HANA 2020 release. Will appreciate your feedback / comments.