When you need to load information into an SAP R/3 system from a legacy
system, a set of tools that falls into the Data Transfer catagory
are used. Between 3.1H and 4.6C there were major changes in this area
of SAP. The old Data Transfer Workbench
can be used, or you can combine the new tools with programs that you
write to effectively manage a data transfer project.
SAP offers The Data Transfer Guidebook www.saplabs.com/dx to
help guide users through the process.
Essentially, if Data Transfer technology is not used, the data must be manually entered. Manually entered data will, as a rule, be cleaner and cause fewer problems in the future. A number of factors go into the choice between manual entry of information vs. Data Transfer . Any large group of records (say 2000 or more) will probably need to be automated. Anything less that 2000 can probably be manually input in less time than it will take to write and correctly test a conversion program, convert the data into a QA environment, test and adjust the conversion, then convert the data into your production system.
However, another factor is time available at go-live.
Data Transfer Workbench
The Data Transfer Workbench
(DXWB) comes standard in SAP R/3, and has been
Note 200656 - The Legacy System Migration Workbench (LSMW or LSM Workbench)
assists in transferring the data to
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