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Hi Sudheekar, Migration of data from Non SAP To SAP is as good as Maintaining New data in the system. Following SAP Tools we can use to accomplish the requirement as mentioned below, LSMW -Legacy System Migration Workbench ---This is Pure Functional tool or T-code through which we can create the recording in the system for respective transaction and make the file for data upload as per required fields to maintain w.r.t. business requirement. BDC---Batch Data Communication -This is Module integration Work i.e. Functional consultant need to perform the recording of the respective transaction like XD01 and give it to ABAP Consultant for further processing and then we can have the T-code and Flat file with required field and format as per requirement. BAPI---Business Application Programming Interface.--- is once of the Most Effective tool to migrate the data like Ex: Creation of SO in Bulk--In case of cut over data where same sales order need to create in SAP Which were closed open in Legacy system. IDOC---Intermediary Document ----- is a standard data structure for electronic data interchange (EDI) between application programs written for the SAP business system or between an SAP application and an external program. I hope above mentioned content will help you to understand the desired concept. Regards, Amit

In real time can we use standards or not? Like OR , TAN ,RE , etc or we following these standards copy it rename it then use which of we following.

Hi Sudheekar, Very valid question, because Now a days working in SAP Has termed as Copy and rename the Std. SAP Configuration and Make the Z. But all the way it is not required, we can go ahead to use the Std. Like OR, TAN, etc. prerequisite to use the same is not to have any changes in the std. offered from SAP. Configuration may change with respect to business requirement and to fulfill the business requirement is top priority without making the direct changes in std. configuration itself as per scenario, that can be cope-up with copy and rename & then we can go for modification. Regards, Amit