The LSM Workbench is an SAP R/3 based tool that supports the one-time or
periodic transfer of data from non-SAP systems ("legacy systems") to SAP
systems.
The LSM Workbench helps you to organize your data migration project and
guides you through the process by using a clear sequence of steps.
The most common conversion rules are predefined. Reusable conversion rules
assure consistent data conversion for different data objects.
LSMW vs DX Workbench
The LSM Workbench covers the following steps:



Read the legacy data from one or several files (e.g. spreadsheet tables,
sequential files).
Convert the data from source format to target format.
Import the data using standard interfaces (Batch Input, Direct Input, BAPI,
IDoc).
Experiences made in successful implementation projects have shown that using
the LSM Workbench significantly contributes to accelerating data migration.
SAP provides this tool along with documentation to customers and partners free
of charge.
Users of the LSM Workbench receive the usual support via SAP Net - R/3
Frontend (component BC-SRV-DX-LSM).