SAP BW or IDT, Which one to use?

Hi Experts,
I'm trying to understand this concept for some time now and need your help in order to put the pieces of this puzzle together in my mind. With IDT, data from multiple data sources can be combined into single schema and further can be used to generate one report. With SAP BW we can achieve the same functionality as well. As far as I understand, all the datasources that are supported by IDT are also supported by BW like : Oracle, IBM DB2, MS SQL Server, SAP HANA. I'm trying to understand the need of SAP IDT/Universe with SAP BW in an organization when we can simply have all the databases connected to SAP BW and consume the data through mostly any BO tools via Bex queries.
I'm sure there's some unique value added to the system by either one of these (IDT, BW) and one cannot be a completely replaced by other and I'm looking to learn the factors that decide what kind of data should flow through IDT or BW. I've noticed in my current organization the sales data flows through IDT/Universe and the remaining (inventory, invoice etc) through BW. Can everything not reside in BW instead of choosing two separate paths ?
I'd really appreciate any inputs on this.
Thanks
Gaurav

Hi Gaurav,
You are touching two different entities.
BO is not here to replace BW. It's majorly focused on reporting area. We can get best reports in BO whereas it is difficult to achieve the same with reporting tools like BEx.
Users will get good look and feel of data analytic features in BO.
BO can connect to all the data bases to get the data into its reports through universe view. where as in BW the connectivity means to get the data into BW to store data physically.
Coming to your business scenario,
Sales data might be residing in non-sap data base where they might be using BO as reporting tool and rest of the data like inventory might be stored in BW hence its using BEx.
Hope you got some clarity
Regards,
Naveen

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