Ever heard about apples and oranges. SAP/R3 is an OLTP system where as BIW
is an OLAP system. LIS reports can not provide the functionality provided
by BIW.
The following information is for you to get more clarity on the subject:
SAP R/3 LIS (Logistic Information System) consist of infostructures (which
are representation of reporting requirements). So whenever any event (goods
reciept, invoice reciept etc. ) takes place in SAP R/3 module, if relevant
to the infostructure, an corresponding entry is made in the infostructures.
Thus infostructures form the database part of the datawarehouse. For
reporting the data (based on OLAP features such drill-down, abc, graphics
etc.), you can use SAP R/3 standard analysis (or flexible analysis) or
Business Warehouse (which is excel based) or Business Objects (which is
third party product but can interface with SAP R/3 infostructures using BAPI
calls).
In short, the infostructures (which are part of SAP R/3 LIS) form the data
basis for reporting with BW.
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