SAP WM vs EWM

SAP WM vs EWM :

 SAP WM is now a part of SAP Logistics execution module and has undergone several releases from the first time it was introduced by SAP as an independant       warehouse solution in the  R/2 environment. From 2006 we see it in its most developed form as a part of LES  which is available as release ECC 6.0 . 

SAP eWM is similar to SAP WM functionality but with more flexibility in customising like the warehouse structure or picking/put away processes. Also new concepts like activity areas, Work Centers, and Resources are incorporated into SAP EWM .

As per SAP , eWM is not projected as a replacement to WM but more as a robust and flexible alternative to WM .
From what I could understand ,here I will compare both the solutions in terms of their functionalites that are available in the versions ECC 6.0  for WM and EWM 7.0  for eWM 
From System documents perspective :
WM has Transfer requests and Transfer orders .Transfer orders are the actual work orders based on which the stock movement takes place withing a warehouse .
eWM has a slightly different presentation of these documents .eWM has Warehouse order which is similar to a WM Transfer order and further a Warehouse task which is similar to Transfer order line item.
In  WM movement types that determine the shipment type in Transfer order .In eWM there is a concept of warehouse process type which determines warehouse task creation with reference to reference document types
In WM printing is controlled by setting up configuration that is primarily based on movement type .In eWM there is new concept called post processing framework.It has a condition table concept with action profiles.

From Architecture perspective:
SAP WM is primarily designed as a central warehouse which is a component of Logistics execution in the same ERP system and integrates with other logistics modules .
SAP eWM  system is designed to run as a Decentralized system.Although it can be deployed in the ERP system it is more commonly considered as an application in the SCM server landscape.
From processes / functionality perspective: Given below the comparision in Yes /No format for the various functionalities offered in SAP ewM .For a similar functionality not available in SAP WM I have mentioned as No .


eWM
WMComments
INBOUND PROCESSING   
Receive ASN dataYes No 
ASN Validation & CorrectionYesNo  
Transporation Unit ArrivalYes No 
Manage Transportation UnitYes No 
Goods ReceiptYesYes 
Putaway Bin determinationYesYes 
Unload Transportation UnitYes No 
Internal RoutingYes No 
SlottingYes No 
DeconsolidationYes No 
PutawayYesYes 
Returns / Reverse LogisticsYes No 
Goods receipts optimizationYes No 


INHOUSE PROCESSESINGeWMWMComments
RearrangementYesNo 
Inventory Counts / Record AccuracyYesYeseWM:inventory based on products and/or based on storage bins.New feature physical inventory during putaway
ReplenishmentYesYes 
Freight Order ManagementYesNo 
Kit to StockYesNo 
OUTBOUND PROCESSINGeWMWMComments
Route DeterminationYesNo 
Wave ManagementYesYes 
Picking Bin DeterminationYesYes 
Warehouse Order CreationYesYesEWM =Warehouse order / WM = Transfer order
Work AssignmentYesYes 
PickingYesYes 
PackingYesYes 
StagingYesYes 
Goods IssueYesYes 
Kit-to orderYesYes 
Prodution SupplyYesYes 
CROSS PROCESSESeWMWMComments
Transportation Cross DockingYesYes 
Yard ManagementYesYes 
Labour ManagementYesNo   SAP WM has TRM 
Opportunistic Cross DockingYesYes 
SUPPORTING PROCESSESeWMWMComments
EH&S IntegrationYesNo 
RF support for processesYesYes 
Batch ManagementYesYes 
Material Flow SystemYesNo 
Warehouse cockpitYesNo 
Goods Receipt – OptimizationYesNo 

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