Blog Clarification: Role of BI developer to get Deltas functional (part 1)

Question

Hi,
I will appreciate some clarification on the following blog that I reviewed:
/people/swapna.gollakota/blog/2007/12/27/how-does-a-datasource-communicates-delta-with-bw  
This blog seems to be suggesting that as a BI developer, you need to know the DELTA TYPEs for each datasource (selected in R3) and with that knowledge, you will be in a better position to choose Update types in ODS/DSO Overwrite or Addition, in the BW/BI environment.
At least that is what I came up with from the review.
1. For each datasource you activate as a BW developer in the BW environment, do you really need to go to R3 and study this datasource through the table RODELTAM to see the datasource type e.g. ABR, ABR1, etc and all the settings such as serialization =1 or 2?
2. I thought these datasouces, e.g. 2LIS_02_HDR are SAP delivered, ready to be used, isnu2019t it?
So, I understood that a decision will have to be made between ABR and ABR1 as the delta type.
i. whose responsibility is it to make such decisions?
ii. The R3 folks or the BW developer?
iii. What influences such decision making?
iv. In this table(RODELTAM), on R3, I saw several u201CXu201Ds under different columns, who sets these?
3. There were also discussions as to whether a datasource supports DSO/Cube or not?
Does this support the argument to study a datasource on R3 side in the table RODELTAM before using it?
Thanks

Answer 1

1. For each datasource you activate as a BW developer in the BW environment, do you really need to go to R3 and study this datasource through the table RODELTAM to see the datasource type e.g. ABR, ABR1, etc and all the settings such as serialization =1 or 2?
If you are a newbie and using it for the first time ofcourse you have to.But I would simply use RSA2 transaction than those tables.
2. I thought these datasouces, e.g. 2LIS_02_HDR are SAP delivered, ready to be used, isnu2019t it?
So, I understood that a decision will have to be made between ABR and ABR1 as the delta type.
i. whose responsibility is it to make such decisions?
ii. The R3 folks or the BW developer?
iii. What influences such decision making?
iv. In this table(RODELTAM), on R3, I saw several u201CXu201Ds under different columns, who sets these?
Ofcourse its BW developer who deals with BW related things.
iii. What influences such decision making?
Your datamodel.
3. There were also discussions as to whether a datasource supports DSO/Cube or not?
Does this support the argument to study a datasource on R3 side in the table RODELTAM before using it?
Datasource supports DSO/Cube, thats the whole point for determining the type of delta.
Hope this helps.