I am Reading and practising on Mr Bharat Patel, Amol Palekar and Shreekant Shiralkar book SAp NetWeaver Business Warehouse 7.0

First of all you have to load all the related master data to your BW system if you want to load the transaction data. For this you have to load the characteristics, later then the manuscripts and after that you have to load the ladders. Sometimes you would not be able to load the master data at the time transaction data is loaded, please make sure that the load process can take twice as long , as the SID’s ought to be working for the distinctive attributes, and at last you have to insert the new records in the master data as well. Before this you have to load a lesser amount of master data to the master data table and then you have to reconstruct the CBO figures for the related tables. As soon as all the procedure is complete you would be able to load the huge amount of master data. If you want to apprise data more rapidly in the BI system you must have to fetch master data from the source system similar in order. But for this you have generate info packages that will further fetch different numbers of the related master data records on account of the applicable assortment standards and list them in parallel. Hope this article might help you to sort out the above issue.

Please have a look on  master data with huge attributes for more details related to your article