Options for loading data from legacy mainframe to SAP CRM and ECC

Hello All,
I am new to SAP.
As part of data conversion planning from legacy mainframe to SAP CRM and ECC systems, I need to know the different tools available for loading the data and comparative analysis of the tools by showing the features. Please also describe the process to evaluate the tools (prototyping, technical discussions etc) and make the recommendations.
I would also appreciate any information on testing tools like (eCATT) and any third party tools (like Informatica)
I know I am asking for lot of things here. But, I really appreciate any information reagrding this.
Thanks,
Balu

Hi
Data Migration(Conversions) mainly involves the following Major Steps
Discovery->Extract->Cleanse->Transform->Load
Discovery-> Involves identifying various source systems available where the actual data is residing.
Extract->Extract the data from the source systems(legacy systems)
Cleanse->Cleanse the data by enriching it,De-duplications etc
Transform->Transform the data into SAP Loadable format
Load->Upload the data into SAP Using the Load Programs(Eg,BDC,LSMW,Data Transfer Workbench,BAPIs etc)
Also i would request you to visit http://www.businessobjects.com/solutions/im/data_migration.asp
Cheers,
Hakim

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